Compare AI models
| Specifications | ||
ParametersThe learned values that shape how a model responds. B means billion and T means trillion. For mixture-of-experts models, the total count is larger than the number active for each token. Parameter count alone does not measure quality. | 128B | — |
Context windowHow much information the model can work with in one request, measured in tokens — pieces of words or other data. This includes your question, attachments, conversation and reply. Limits can vary by model variant and provider. | 256k | 200k |
| API pricingUSD per 1M tokens · lower wins | ||
Input priceWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it. | $1.50 | $150.00 |
Output priceWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one. | $7.50 | $600.00 |
Cheapest inputLowest input rate across every provider on OpenRouter, the lab included. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | $1.50Mistral | $150.00OpenAI |
Cheapest outputLowest output rate across every provider on OpenRouter, the lab included. May come from a different provider than the cheapest input. | $7.50Mistral | $600.00OpenAI |
| $675Mistral list price | $60,000OpenAI list price | |
| These models have no shared benchmark scores. | ||
SWE-Bench VerifiedCoding — Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 77.6% | — |
| Overview | ||
| Company | Mistral | OpenAI |
| Release date | Apr 29 2026 | Mar 19 2025 |
| Access | Open Weight | Closed |
| Model details | View model | View model |
Other comparisons
Mistral Medium 3.5vsClaude Haiku 5.5o1-provsClaude Haiku 5.5Mistral Medium 3.5vsGemini 4 Argono1-provsGemini 4 ArgonMistral Medium 3.5vsMuse Spark Openo1-provsMuse Spark OpenMistral Medium 3.5vsGrok 4.7o1-provsGrok 4.7Mistral Medium 3.5vsDeepSeek-V4.1-Flash-1017o1-provsDeepSeek-V4.1-Flash-1017Mistral Medium 3.5vsKimi K3o1-provsKimi K3Frequently asked questions
Mistral Medium 3.5 and o1-pro don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral Medium 3.5 is cheaper on both input and output: $1.50 vs $150.00 per million input tokens, and $7.50 vs $600.00 per million output tokens. o1-pro shipped 406 days before Mistral Medium 3.5, so benchmark comparisons should account for the intervening progress.
Context windows are 256k (Mistral Medium 3.5) vs 200k (o1-pro). Mistral Medium 3.5 is open weight, while o1-pro is closed.
Direct benchmark comparisons are unavailable — Mistral Medium 3.5 and o1-pro don't publish scores on any of the same benchmarks.