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Mistral Large 3 vs OpenAI GPT-OSS 20B

Mistral Large 3 is not currently in the Allocate serving catalog, so this page lists no prices for it: every price on this site comes from the live catalog.

Mistral Large 3 OpenAI GPT-OSS 20B
LabMistralOpenAI
AccessNot served on AllocateOpen weights
Context windown/a128K tokens
List price, inputNot served$0.05 / M tokens
List price, outputNot served$0.2 / M tokens
Cached inputn/an/a
LicenseProprietary APIApache 2.0
Fine-tunableNoYes

Specifications and provider list prices from the Allocate catalog, checked 2026-07-08. Billed price is list plus the 7% transaction fee.

Choose Mistral Large 3 for

  • EU data-residency workloads
  • Structured outputs
  • Function calling
Mistral Large 3 details

Choose OpenAI GPT-OSS 20B for

  • Open weights you can fine-tune and own
  • Fine-tuning under a permissive license (Apache 2.0)
OpenAI GPT-OSS 20B details

Common questions

Which has the bigger context window?

OpenAI GPT-OSS 20B: 131,072 tokens (128K) against an unlisted window for Mistral Large 3.

Can I fine-tune Mistral Large 3 or OpenAI GPT-OSS 20B?

OpenAI GPT-OSS 20B publishes open weights (Apache 2.0) and can be fine-tuned on your own data. Mistral Large 3 is a closed model served over API; its weights are not available.

Related comparisons

Mistral Large 3 vs OpenAI GPT-OSS 120BOpenAI GPT-OSS 20B vs OpenAI GPT-OSS 120BMistral Large 3 vs GPT-5.5OpenAI GPT-OSS 20B vs GPT-5.5OpenAI GPT-OSS 20B vs Meta Llama 3 8B Instruct LiteMistral Large 3 vs Llama 4 Scout Instruct (17Bx16E)

Run the numbers on your workload

LLM price comparisonAgent cost calculatorMistral Large 3OpenAI GPT-OSS 20B

Or don’t choose. On Allocate a route name is the contract: point yours at one model today, swap to the other tomorrow, and compare them on your live traffic with per-token metering.

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