Mistral Large 3 vs GPT-5.5
Side-by-side comparison across metrics, pricing, and overall score — every value traced to a source.
Verdict: GPT-5.5 ranks highest overall (#3) with a score of 52.5.
The best choice still depends on which metrics matter for your workload — per-metric winners are marked below.
What the numbers hide
Computed from the published values below — no estimates, no generated claims.
Fragile verdict
The overall winner flips to GPT-5.5 if Context Window is weighted at 30% (it counts for 18% today). If context window drives your decision, the ranking above may not be your ranking.
Fragile verdict
The overall winner flips to GPT-5.5 if Output Price is weighted at 0% (it counts for 18% today). If output price drives your decision, the ranking above may not be your ranking.
Real tradeoff
Mistral Large 3 clearly beats GPT-5.5 on Input Price but clearly loses on Context Window — this pair is a priorities question, not a quality question.
What nobody reports
Cache Read Price (1 of 2 missing) · SWE-Bench Pro Score (1 of 2 missing) — the questions worth asking vendors directly.
AI hot take
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| Metric | Mistral Large 3Mistral | GPT-5.5OpenAI |
|---|---|---|
| Overall OptiSift Score | 21.7#15 | 52.5#3 |
| Input Price | $0.5 | $5 |
| Output Price | $1.5 | $30 |
| Cache Read Price | — | $0.5 |
| Context Window | 262K | 1.1M |
| Max Output Tokens | 262K | 128K |
| SWE-Bench Pro Score | — | 58.6% |
| Tool Calling | Yes | Yes |
| Extended Reasoning | No | Yes |