GPT-5.5 vs Mistral Medium 3.5
Rank, tier, score and price side by side, from our weekly rankings. Scores are editorial opinion based on public sources.
A
GPT-5.5
B
Mistral Medium 3.5
- ProviderOpenAIMistral AI
- Rank#23Higher rank#27
- TierAA
- Score84.0Higher score83.6
- PriceAPI $5 input / $30 output per 1M tokensOpen weights (Modified MIT); API $1.50 input / $7.50 output per 1M tokens via MistralLower price tier
- TaglineOpenAI's April 2026 flagship for complex professional and agentic coding work, since followed by the GPT-5.6 family (July 2026) and GPT-6 Astra (September 2026).Frontier-class multimodal model from Mistral optimized for agentic and coding use cases.
| Attribute | GPT-5.5 | Mistral Medium 3.5 |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Rank | #23Higher rank | #27 |
| Tier | A | A |
| Score | 84.0Higher score | 83.6 |
| Price | API $5 input / $30 output per 1M tokens | Open weights (Modified MIT); API $1.50 input / $7.50 output per 1M tokens via MistralLower price tier |
| Tagline | OpenAI's April 2026 flagship for complex professional and agentic coding work, since followed by the GPT-5.6 family (July 2026) and GPT-6 Astra (September 2026). | Frontier-class multimodal model from Mistral optimized for agentic and coding use cases. |