Model comparison
Devstral Small 2505 vs Hy4 preview
Hy4 preview is the stronger model overall, scoring 44.6 to 33.9 on the Noometry Index. Devstral Small 2505 costs 8.3× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Mistral AI
TencentSummary
- The widest gap is in coding, where Hy4 preview leads 51.4 to 38.6.
- Devstral Small 2505 is cheaper at $0.10 / $0.30 per million input/output tokens, against $0.83 / $2.50 for Hy4 preview.
- Hy4 preview accepts more context: 1.05M tokens versus 128K.
Side by side
| Devstral Small 2505 | Hy4 preview | |
|---|---|---|
| Provider | Mistral AI | Tencent |
| Noometry Index | 33.9 | 44.6 |
| Released | 2025-05-07 | 2026-08-28 |
| Weights | Open | Open |
| Context window | 128K | 1.05M |
| Max output | 128K | 64K |
| Input $ / M tokens | $0.10 | $0.83 |
| Output $ / M tokens | $0.30 | $2.50 |
| Results tracked | 4 | 3 |
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Category by category
Coding Hy4 preview leads
Devstral Small 2505: 38.6 (#160), Hy4 preview: 51.4 (#36)
| Benchmark | Devstral Small 2505 | Hy4 preview |
|---|---|---|
| SWE-bench Verified (bash only) | 56.4% | — |
| LMArena WebDev | — | 1633 |
| SciCode | 28.8% | — |
Reasoning Hy4 preview leads
Devstral Small 2505: 19.1 (#243), Hy4 preview: 30.6 (#75)
| Benchmark | Devstral Small 2505 | Hy4 preview |
|---|---|---|
| Kagi LLM Benchmark | 37.7% | — |
| NYT Connections (extended) | — | 68.2% |
| CritPt | 0% | — |
Math Not comparable
Devstral Small 2505: —, Hy4 preview: 54.5 (#37)
| Benchmark | Devstral Small 2505 | Hy4 preview |
|---|---|---|
| ProofBench | — | 75% |
Frequently asked questions
Is Devstral Small 2505 better than Hy4 preview?
Hy4 preview is the stronger model overall, scoring 44.6 to 33.9 on the Noometry Index. Devstral Small 2505 costs 8.3× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.
Which is cheaper, Devstral Small 2505 or Hy4 preview?
Devstral Small 2505 is cheaper. It lists at $0.10 per million input tokens and $0.30 per million output tokens; Hy4 preview lists at $0.83 and $2.50.
Is Devstral Small 2505 or Hy4 preview better for coding?
Hy4 preview scores higher on coding benchmarks: 51.4 versus 38.6 in the Noometry coding category.
Which has the bigger context window?
Hy4 preview does, with 1.05M tokens against 128K.
How many benchmarks do Devstral Small 2505 and Hy4 preview share?
0 benchmarks have published results for both models. Devstral Small 2505 has 4 scored results on Noometry and Hy4 preview has 3.