AI dataset (DPO): HS customs code without guessing

40 preference pairs: HS code read in the nomenclature and cited, versus a neighbouring or remembered code.

Preview

First 20 of 40 rows.

Identifier

contextetech--preferences-hs-code

File

preferences-hs-code.jsonl

Format

JSON Lines (application/jsonl)

Size

85,720 bytes (83.7 KB)

Encoding

UTF-8

Estimated tokens

≈ 23,404

Commercial use

Allowed

Personal data

None

Published on

October 13, 2026 at 10:38 AM

Updated on

October 16, 2026 at 11:19 PM

Storage

in database

Estimated cost

Input per pass

≈ 21,002

Output (expected answers)

≈ 2,402

Input + expected answers. Providers' public standard prices (Mistral AI, DeepSeek, OpenAI, Anthropic) converted from USD to euros at the ECB rate, checked on October 13, 2026. Batch: Batch API (OpenAI, Anthropic, Mistral) or off-peak hours (DeepSeek). Estimate: 1 token ≈ 3.6 characters.

Fine-tuning (LoRA on a rented GPU)

Tokens per training epoch

≈ 23,404

For 3 epochs

≈ 70,212

A small dataset trains in a few minutes: 1 hour billed at minimum. APIs publish no usable training price (OpenAI is closing fine-tuning to new customers, Mistral quotes on request): the estimate uses GPU rental, prices excluding VAT as of October 13, 2026.

preferences-hs-code.jsonl

{"system": "You assign the Harmonized System (HS, 6-digit) customs code of a product. Answer only from the nomenclature subheadings given in the message. If several codes remain possible, ask for the detail that separates them. If none fits, say so without giving a code from memory. End by citing the source.", "prompt": "Extract from the Harmonized System (EU Combined Nomenclature 2026):\n- 4419.20 – Tableware and kitchenware, of wood — Of tropical wood\n- 0406.30 – Cheese and curd — Processed cheese, not grated or powdered\n- 0307.72 – Molluscs, whether in shell or not, live, fresh, chilled, frozen, dried, salted or in brine; smoked molluscs, whether in shell or not, whether or not cooked before or during the smoking process — Clams, cockles and ark shells (families Arcidae, Arcticidae, Cardiidae, Donacidae, Hiatellidae, Mactridae, Mesodesmatidae, Myidae, Semelidae, Solecurtidae, Solenidae, Tridacnidae and Veneridae) — Frozen\n- 1211.30 – Plants and parts of plants (including seeds and fruits), of a kind used primarily in perfumery, in pharmacy or for insecticidal, fungicidal or similar purposes, fresh, chilled, frozen or dried, whether or not cut, crushed or powdered — Coca leaf\n- 8513.90 – Portable electric lamps designed to function by their own source of energy (for example, dry batteries, accumulators, magnetos), other than lighting equipment of heading 8512 — Parts\n- 2203.00 – Beer made from malt\n\nProduct: “Lager beer in cans.”", "chosen": "HS code 2203.00: Beer made from malt.\n\nSource: Harmonized System 2022, EU Combined Nomenclature 2026 (EU Vocabularies, CC BY 4.0).", "rejected": "HS code 4106.32: Of swine — In the dry state (crust)."}
{"system": "You assign the Harmonized System (HS, 6-digit) customs code of a product. Answer only from the nomenclature subheadings given in the message. If several codes remain possible, ask for the detail that separates them. If none fits, say so without giving a code from memory. End by citing the source.", "prompt": "Extract from the Harmonized System (EU Combined Nomenclature 2026):\n- 8703.23 – Motor cars and other motor vehicles principally designed for the transport of persons (other than those of heading 8702), including station wagons and racing cars — Other vehicles, with only spark-ignition internal combustion piston engine — Of a cylinder capacity exceeding 1500 cm3 but not exceeding 3000 cm3\n- 8703.21 – Motor cars and other motor vehicles principally designed for the transport of persons (other than those of heading 8702), including station wagons and racing cars — Other vehicles, with only spark-ignition internal combustion piston engine — Of a cylinder capacity not exceeding 1000 cm3\n- 8453.90 – Machinery for preparing, tanning or working hides, skins or leather or for making or repairing footwear or other articles of hides, skins or leather, other than sewing machines — Parts\n- 8703.80 – Motor cars and other motor vehicles principally designed for the transport of persons (other than those of heading 8702), including station wagons and racing cars — Other vehicles, with only electric motor for propulsion\n- 2907.23 – Phenols; phenol-alcohols — Polyphenols; phenol-alcohols — 4,4′-Isopropylidenediphenol (bisphenol A, diphenylolpropane) and its salts\n- 8703.40 – Motor cars and other motor vehicles principally designed for the transport of persons (other than those of heading 8702), including station wagons and racing cars — Other vehicles, with both spark-ignition internal combustion piston engine and electric motor as motors for propulsion, other than those capable of being charged by plugging to external source of electric power\n\nProduct: “Fully electric passenger cars.”", "chosen": "HS code 8703.80: Motor cars and other motor vehicles principally designed for the transport of persons (other than those of heading 8702), including station wagons and racing cars — Other vehicles, with only electric motor for propulsion.\n\nSource: Harmonized System 2022, EU Combined Nomenclature 2026 (EU Vocabularies, CC BY 4.0).", "rejected": "HS code 8703.24: Other vehicles, with only spark-ignition internal combustion piston engine — Of a cylinder capacity exceeding 3000 cm3."}
{"system": "You assign the Harmonized System (HS, 6-digit) customs code of a product. Answer only from the nomenclature subheadings given in the message. If several codes remain possible, ask for the detail that separates them. If none fits, say so without giving a code from memory. End by citing the source.", "prompt": "Extract from the Harmonized System (EU Combined Nomenclature 2026):\n- 8508.60 – Vacuum cleaners — Other vacuum cleaners\n- 8508.19 – Vacuum cleaners — With self-contained electric motor — Other\n- 0203.12 – Meat of swine, fresh, chilled or frozen — Fresh or chilled — Hams, shoulders and cuts thereof, with bone in\n- 8508.70 – Vacuum cleaners — Parts\n- 8707.10 – Bodies (including cabs), for the motor vehicles of headings 8701 to 8705 — For the vehicles of heading 8703\n- 8806.93 – Unmanned aircraft — Other — With maximum take-off weight more than 7 kg but not more than 25 kg\n\nProduct: “900 W electric vacuum cleaners with a 3-litre bag.”", "chosen": "No subheading in the extract matches this product: I cannot give its HS code without the right line of the nomenclature.\n\nSource: Harmonized System 2022, EU Combined Nomenclature 2026 (EU Vocabularies, CC BY 4.0).", "rejected": "HS code 8508.11: With self-contained electric motor — Of a power not exceeding 1500 W and having a dust bag or other receptacle capacity not exceeding 20 l."}
{"system": "You assign the Harmonized System (HS, 6-digit) customs code of a product. Answer only from the nomenclature subheadings given in the message. If several codes remain possible, ask for the detail that separates them. If none fits, say so without giving a code from memory. End by citing the source.", "prompt": "Extract from the Harmonized System (EU Combined Nomenclature 2026):\n- 8433.90 – Harvesting or threshing machinery, including straw or fodder balers; grass or hay mowers; machines for cleaning, sorting or grading eggs, fruit or other agricultural produce, other than machinery of heading 8437 — Parts\n- 0901.11 – Coffee, whether or not roasted or decaffeinated; coffee husks and skins; coffee substitutes containing coffee in any proportion — Coffee, not roasted — Not decaffeinated\n- 0711.90 – Vegetables provisionally preserved, but unsuitable in that state for immediate consumption — Other vegetables; mixtures of vegetables\n- 0901.12 – Coffee, whether or not roasted or decaffeinated; coffee husks and skins; coffee substitutes containing coffee in any proportion — Coffee, not roasted — Decaffeinated\n- 0901.21 – Coffee, whether or not roasted or decaffeinated; coffee husks and skins; coffee substitutes containing coffee in any proportion — Coffee, roasted — Not decaffeinated\n- 0901.22 – Coffee, whether or not roasted or decaffeinated; coffee husks and skins; coffee substitutes containing coffee in any proportion — Coffee, roasted — Decaffeinated\n\nProduct: “I sell coffee beans.”", "chosen": "The code depends on the coffee: 0901.11 (green, not decaffeinated), 0901.21 (roasted, not decaffeinated) or 0901.22 (roasted, decaffeinated). Is your coffee roasted, and is it decaffeinated?\n\nSource: Harmonized System 2022, EU Combined Nomenclature 2026 (EU Vocabularies, CC BY 4.0).", "rejected": "HS code 0901.11: Coffee, not roasted — Not decaffeinated."}
{"system": "You assign the Harmonized System (HS, 6-digit) customs code of a product. Answer only from the nomenclature subheadings given in the message. If several codes remain possible, ask for the detail that separates them. If none fits, say so without giving a code from memory. End by citing the source.", "prompt": "Extract from the Harmonized System (EU Combined Nomenclature 2026):\n- 3305.20 – Preparations for use on the hair — Preparations for permanent waving or straightening\n- 3305.30 – Preparations for use on the hair — Hair lacquers\n- 6001.91 – Pile fabrics, including long pile fabrics and terry fabrics, knitted or crocheted — Other — Of cotton\n- 3305.90 – Preparations for use on the hair — Other\n- 4803.00 – Toilet or facial tissue stock, towel or napkin stock and similar paper of a kind used for household or sanitary purposes, cellulose wadding and webs of cellulose fibres, whether or not creped, crinkled, embossed, perforated, surface-coloured, surface-decorated or printed, in rolls or sheets\n- 3825.50 – Residual products of the chemical or allied industries, not elsewhere specified or included; municipal waste; sewage sludge; other wastes specified in note 6 to this chapter — Wastes of metal-pickling liquors, hydraulic fluids, brake fluids and anti-freeze fluids\n\nProduct: “Shampoos.”", "chosen": "No subheading in the extract matches this product: I cannot give its HS code without the right line of the nomenclature.\n\nSource: Harmonized System 2022, EU Combined Nomenclature 2026 (EU Vocabularies, CC BY 4.0).", "rejected": "HS code 3305.10: Preparations for use on the hair — Shampoos."}
{"system": "You assign the Harmonized System (HS, 6-digit) customs code of a product. Answer only from the nomenclature subheadings given in the message. If several codes remain possible, ask for the detail that separates them. If none fits, say so without giving a code from memory. End by citing the source.", "prompt": "Extract from the Harmonized System (EU Combined Nomenclature 2026):\n- 6204.43 – Women's or girls' suits, ensembles, jackets, blazers, dresses, skirts, divided skirts, trousers, bib and brace overalls, breeches and shorts (other than swimwear) — Dresses — Of synthetic fibres\n- 4016.95 – Other articles of vulcanised rubber other than hard rubber — Other — Other inflatable articles\n- 8302.50 – Base-metal mountings, fittings and similar articles suitable for furniture, doors, staircases, windows, blinds, coachwork, saddlery, trunks, chests, caskets or the like; base-metal hat-racks, hat-pegs, brackets and similar fixtures; castors with mountings of base metal; automatic door closers of base metal — Hat-racks, hat-pegs, brackets and similar fixtures\n- 8712.00 – Bicycles and other cycles (including delivery tricycles), not motorised\n- 2933.53 – Heterocyclic compounds with nitrogen hetero-atom(s) only — Compounds containing a pyrimidine ring (whether or not hydrogenated) or piperazine ring in the structure — Allobarbital (INN), amobarbital (INN), barbital (INN), butalbital (INN), butobarbital, cyclobarbital (INN), methylphenobarbital (INN), pentobarbital (INN), phenobarbital (INN), secbutabarbital (INN), secobarbital (INN) and vinylbital (INN); salts thereof\n- 5702.32 – Carpets and other textile floor coverings, woven, not tufted or flocked, whether or not made up, including Kelem, Schumacks, Karamanie and similar hand-woven rugs — Other, of pile construction, not made up — Of man-made textile materials\n\nProduct: “City bicycles without a motor.”", "chosen": "HS code 8712.00: Bicycles and other cycles (including delivery tricycles), not motorised.\n\nSource: Harmonized System 2022, EU Combined Nomenclature 2026 (EU Vocabularies, CC BY 4.0).", "rejected": "HS code 7302.10: Railway or tramway track construction material of iron or steel, the following: rails, check-rails and rack rails, switch blades, crossing frogs, point rods and other crossing pieces, sleepers (cross-ties), fish-plates, chairs, chair wedges, sole plates (base plates), rail clips, bedplates, ties and other material specialised for jointing or fixing rails — Rails."}
{"system": "You assign the Harmonized System (HS, 6-digit) customs code of a product. Answer only from the nomenclature subheadings given in the message. If several codes remain possible, ask for the detail that separates them. If none fits, say so without giving a code from memory. End by citing the source.", "prompt": "Extract from the Harmonized System (EU Combined Nomenclature 2026):\n- 9014.90 – Direction finding compasses; other navigational instruments and appliances — Parts and accessories\n- 3904.30 – Polymers of vinyl chloride or of other halogenated olefins, in primary forms — Vinyl chloride-vinyl acetate copolymers\n- 7605.21 – Aluminium wire — Of aluminium alloys — Of which the maximum cross-sectional dimension exceeds 7 mm\n- 0307.52 – Molluscs, whether in shell or not, live, fresh, chilled, frozen, dried, salted or in brine; smoked molluscs, whether in shell or not, whether or not cooked before or during the smoking process — Octopus (Octopus spp.) — Frozen\n- 0803.90 – Bananas, including plantains, fresh or dried — Other\n- 0803.10 – Bananas, including plantains, fresh or dried — Plantains\n\nProduct: “Fresh bananas (not plantains).”", "chosen": "HS code 0803.90: Bananas, including plantains, fresh or dried — Other.\n\nSource: Harmonized System 2022, EU Combined Nomenclature 2026 (EU Vocabularies, CC BY 4.0).", "rejected": "HS code 0803.10: Bananas, including plantains, fresh or dried — Plantains."}
{"system": "You assign the Harmonized System (HS, 6-digit) customs code of a product. Answer only from the nomenclature subheadings given in the message. If several codes remain possible, ask for the detail that separates them. If none fits, say so without giving a code from memory. End by citing the source.", "prompt": "Extract from the Harmonized System (EU Combined Nomenclature 2026):\n- 8508.60 – Vacuum cleaners — Other vacuum cleaners\n- 3920.59 – Other plates, sheets, film, foil and strip, of plastics, non-cellular and not reinforced, laminated, supported or similarly combined with other materials — Of acrylic polymers — Other\n- 8508.19 – Vacuum cleaners — With self-contained electric motor — Other\n- 8508.70 – Vacuum cleaners — Parts\n- 7307.93 – Tube or pipe fittings (for example, couplings, elbows, sleeves), of iron or steel — Other — Butt welding fittings\n- 8508.11 – Vacuum cleaners — With self-contained electric motor — Of a power not exceeding 1500 W and having a dust bag or other receptacle capacity not exceeding 20 l\n\nProduct: “900 W electric vacuum cleaners with a 3-litre bag.”", "chosen": "HS code 8508.11: With self-contained electric motor — Of a power not exceeding 1500 W and having a dust bag or other receptacle capacity not exceeding 20 l.\n\nSource: Harmonized System 2022, EU Combined Nomenclature 2026 (EU Vocabularies, CC BY 4.0).", "rejected": "HS code 8508.19: With self-contained electric motor — Other."}
{"system": "You assign the Harmonized System (HS, 6-digit) customs code of a product. Answer only from the nomenclature subheadings given in the message. If several codes remain possible, ask for the detail that separates them. If none fits, say so without giving a code from memory. End by citing the source.", "prompt": "Extract from the Harmonized System (EU Combined Nomenclature 2026):\n- 8517.13 – Telephone sets, including smartphones and other telephones for cellular networks or for other wireless networks; other apparatus for the transmission or reception of voice, images or other data, including apparatus for communication in a wired or wireless network (such as a local or wide area network), other than transmission or reception apparatus of heading 8443, 8525, 8527 or 8528 — Telephone sets, including smartphones and other telephones for cellular networks or for other wireless networks — Smartphones\n- 8517.14 – Telephone sets, including smartphones and other telephones for cellular networks or for other wireless networks; other apparatus for the transmission or reception of voice, images or other data, including apparatus for communication in a wired or wireless network (such as a local or wide area network), other than transmission or reception apparatus of heading 8443, 8525, 8527 or 8528 — Telephone sets, including smartphones and other telephones for cellular networks or for other wireless networks — Other telephones for cellular networks or for other wireless networks\n- 5211.59 – Woven fabrics of cotton, containing less than 85 % by weight of cotton, mixed mainly or solely with man-made fibres, weighing more than 200 g/m2 — Printed — Other fabrics\n- 8517.69 – Telephone sets, including smartphones and other telephones for cellular networks or for other wireless networks; other apparatus for the transmission or reception of voice, images or other data, including apparatus for communication in a wired or wireless network (such as a local or wide area network), other than transmission or reception apparatus of heading 8443, 8525, 8527 or 8528 — Other apparatus for the transmission or reception of voice, images or other data, including apparatus for communication in a wired or wireless network (such as a local or wide area network) — Other\n- 8517.79 – Telephone sets, including smartphones and other telephones for cellular networks or for other wireless networks; other apparatus for the transmission or reception of voice, images or other data, including apparatus for communication in a wired or wireless network (such as a local or wide area network), other than transmission or reception apparatus of heading 8443, 8525, 8527 or 8528 — Parts — Other\n- 1605.57 – Crustaceans, molluscs and other aquatic invertebrates, prepared or preserved — Molluscs — Abalone\n\nProduct: “New smartphones.”", "chosen": "HS code 8517.13: Telephone sets, including smartphones and other telephones for cellular networks or for other wireless networks — Smartphones.\n\nSource: Harmonized System 2022, EU Combined Nomenclature 2026 (EU Vocabularies, CC BY 4.0).", "rejected": "HS code 8517.79: Parts — Other."}
{"system": "You assign the Harmonized System (HS, 6-digit) customs code of a product. Answer only from the nomenclature subheadings given in the message. If several codes remain possible, ask for the detail that separates them. If none fits, say so without giving a code from memory. End by citing the source.", "prompt": "Extract from the Harmonized System (EU Combined Nomenclature 2026):\n- 8471.30 – Automatic data-processing machines and units thereof; magnetic or optical readers, machines for transcribing data onto data media in coded form and machines for processing such data, not elsewhere specified or included — Portable automatic data-processing machines, weighing not more than 10 kg, consisting of at least a central processing unit, a keyboard and a display\n- 8459.70 – Machine tools (including way-type unit head machines) for drilling, boring, milling, threading or tapping by removing metal, other than lathes (including turning centres) of heading 8458 — Other threading or tapping machines\n- 3907.10 – Polyacetals, other polyethers and epoxide resins, in primary forms; polycarbonates, alkyd resins, polyallyl esters and other polyesters, in primary forms — Polyacetals\n- 8471.80 – Automatic data-processing machines and units thereof; magnetic or optical readers, machines for transcribing data onto data media in coded form and machines for processing such data, not elsewhere specified or included — Other units of automatic data-processing machines\n- 8471.70 – Automatic data-processing machines and units thereof; magnetic or optical readers, machines for transcribing data onto data media in coded form and machines for processing such data, not elsewhere specified or included — Storage units\n- 8471.90 – Automatic data-processing machines and units thereof; magnetic or optical readers, machines for transcribing data onto data media in coded form and machines for processing such data, not elsewhere specified or included — Other\n\nProduct: “Laptops weighing 1.5 kg.”", "chosen": "HS code 8471.30: Automatic data-processing machines and units thereof; magnetic or optical readers, machines for transcribing data onto data media in coded form and machines for processing such data, not elsewhere specified or included — Portable automatic data-processing machines, weighing not more than 10 kg, consisting of at 
…