# Devstral Small 2505 vs GPT-5.2 Pro

> GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 33.9 on the Noometry Index. Devstral Small 2505 costs 385× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/devstral-small-vs-gpt-5-2-pro
- Last updated: 2026-10-10
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where GPT-5.2 Pro leads 51.8 to 19.1.
- Devstral Small 2505 is cheaper at $0.10 / $0.30 per million input/output tokens, against $21 / $168 for GPT-5.2 Pro.
- GPT-5.2 Pro accepts more context: 400K tokens versus 128K.
- Devstral Small 2505 has downloadable open weights; the other is API-only.

## Snapshot

| | Devstral Small 2505 | GPT-5.2 Pro |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Noometry Index | 33.9 | 52.2 |
| Rank | 228 | 34 |
| Context | 128K | 400K |
| Input $/M | $0.10 | $21 |
| Output $/M | $0.30 | $168 |
| Weights | Open | Proprietary |

## Coding

- Devstral Small 2505: 38.6 (#160)
- GPT-5.2 Pro: —

| Benchmark | Devstral Small 2505 | GPT-5.2 Pro |
|---|---|---|
| SWE-bench Verified (bash only) | 56.4% | — |
| SciCode | 28.8% | — |

## Reasoning

- Devstral Small 2505: 19.1 (#243)
- GPT-5.2 Pro: 51.8 (#31)

| Benchmark | Devstral Small 2505 | GPT-5.2 Pro |
|---|---|---|
| ARC-AGI-2 | — | 54.2% |
| SimpleBench | — | 57.4% |
| Kagi LLM Benchmark | 37.7% | — |
| NYT Connections (extended) | — | 79.3% |
| ARC-AGI-1 | — | 90.5% |
| CritPt | 0% | — |
| Epoch Capabilities Index | — | 155.41 |

## Math

- Devstral Small 2505: —
- GPT-5.2 Pro: 64.8 (#23)

| Benchmark | Devstral Small 2505 | GPT-5.2 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 74% |
| FrontierMath Tier 4 | — | 46% |
| FrontierMath Tier 4 (v1) | — | 31.3% |

## FAQ

### Is Devstral Small 2505 better than GPT-5.2 Pro?

GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 33.9 on the Noometry Index. Devstral Small 2505 costs 385× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.

### Which is cheaper, Devstral Small 2505 or GPT-5.2 Pro?

Devstral Small 2505 is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; GPT-5.2 Pro lists at $21 and $168.

### Which has the bigger context window?

GPT-5.2 Pro does, with 400K tokens against 128K.

### How many benchmarks do Devstral Small 2505 and GPT-5.2 Pro share?

0 benchmarks have published results for both models. Devstral Small 2505 has 4 scored results on Noometry and GPT-5.2 Pro has 8.