OpenAI: GPT-5.5 Pro vs Mistral: Mistral Large 3 2512
Side-by-side comparison — pricing, context window, capabilities, and live leaderboard data.
Key differences
- OpenAI: GPT-5.5 Pro has a 1050K-token context window — 4.0× larger than Mistral: Mistral Large 3 2512's 262K.
- Mistral: Mistral Large 3 2512 is 98% cheaper per 1K input tokens than OpenAI: GPT-5.5 Pro ($0.0005 vs $0.0300).
- OpenAI: GPT-5.5 Pro is built by OpenAI; Mistral: Mistral Large 3 2512 is built by Mistral.
Specifications
| OpenAI: GPT-5.5 Pro | Mistral: Mistral Large 3 2512 | |
|---|---|---|
| Provider | OpenAI | Mistral |
| Context window | 1050K | 262K |
| Max output tokens | 8192 | 8192 |
| Input price / 1K tokens | $0.0300 | $0.0005 |
| Output price / 1K tokens | $0.1800 | $0.0015 |
| Vision support | Yes | Yes |
| Function calling | No | No |
| License | Proprietary | Proprietary |
About OpenAI: GPT-5.5 Pro
US·ClosedGPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...
View OpenAI: GPT-5.5 Pro reliability and benchmark history →About Mistral: Mistral Large 3 2512
EU·ClosedMistral Large 3 2512 is Mistral’s most capable model to date, featuring a sparse mixture-of-experts architecture with 41B active parameters (675B total), and released under the Apache 2.0 license.
View Mistral: Mistral Large 3 2512 reliability and benchmark history →Try them yourself
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