Model comparison
GPT-5.5 Pro vs Mistral Nemo
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 26.4 on the Noometry Index. Mistral Nemo costs 450× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Last verified . 3 shared benchmarks.
Mistral AISummary
- They share 3 benchmarks with published results for both. GPT-5.5 Pro scores higher in 3 categories and Mistral Nemo in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.5 Pro leads 84.0 to 25.5.
- The biggest single-benchmark swing is GPQA Diamond: 93.9% for GPT-5.5 Pro and 29.9% for Mistral Nemo.
- Mistral Nemo is cheaper at $0.15 / $0.15 per million input/output tokens, against $30 / $180 for GPT-5.5 Pro.
- GPT-5.5 Pro accepts more context: 1.05M tokens versus 128K.
- Mistral Nemo has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | Mistral Nemo | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Noometry Index | 64.3 | 26.4 |
| Released | 2026-04-23 | 2024-07-01 |
| Weights | Proprietary | Open |
| Context window | 1.05M | 128K |
| Max output | 128K | 128K |
| Input $ / M tokens | $30 | $0.15 |
| Output $ / M tokens | $180 | $0.15 |
| Results tracked | 14 | 10 |
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Category by category
Agentic & Tool Use Not comparable
GPT-5.5 Pro: —, Mistral Nemo: 23.5 (#125)
| Benchmark | GPT-5.5 Pro | Mistral Nemo |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 27.6% |
| BALROG | — | 17.6% |
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.3 (#10), Mistral Nemo: 20.7 (#232)
| Benchmark | GPT-5.5 Pro | Mistral Nemo |
|---|---|---|
| DTBench | 96% | 48.6% |
| Epoch Capabilities Index | 162.07 | 118.68 |
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| Chess Puzzles | 64% | — |
| LMCA | 53.9% | — |
| PIQA | — | 83.5% |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 84.0 (#10), Mistral Nemo: 25.5 (#268)
| Benchmark | GPT-5.5 Pro | Mistral Nemo |
|---|---|---|
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
| MATH Level 5 | — | 10.8% |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
| GSM8K | — | 84.2% |
Knowledge GPT-5.5 Pro leads
GPT-5.5 Pro: 64.1 (#19), Mistral Nemo: 12.3 (#298)
| Benchmark | GPT-5.5 Pro | Mistral Nemo |
|---|---|---|
| GPQA Diamond | 93.9% | 29.9% |
| BoolQ | — | 82.5% |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Mistral Nemo: 28.5 (#296)
| Benchmark | GPT-5.5 Pro | Mistral Nemo |
|---|---|---|
| EQ-Bench Creative Writing | — | 881 |
Frequently asked questions
Is GPT-5.5 Pro better than Mistral Nemo?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 26.4 on the Noometry Index. Mistral Nemo costs 450× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.5 Pro or Mistral Nemo?
Mistral Nemo is cheaper. It lists at $0.15 per million input tokens and $0.15 per million output tokens; GPT-5.5 Pro lists at $30 and $180.
Which has the bigger context window?
GPT-5.5 Pro does, with 1.05M tokens against 128K.
How many benchmarks do GPT-5.5 Pro and Mistral Nemo share?
3 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Mistral Nemo has 10.