Devstral Small 2505 vs Step 3.5 Flash
Both have similar output pricing, while Step 3.5 Flash offers a larger context window. Choose Devstral Small 2505 or Step 3.5 Flash based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Devstral Small 2505 | Step 3.5 Flash |
|---|---|---|
| Provider | Mistral | StepFun |
| Input / 1M tokens | $0.10 | $0.10 |
| Output / 1M tokens | $0.30 | $0.30 |
| Context window | 128K | 262K |
| Parameters | — | — |
| Open weights | Yes | Yes |
| Released | May 2025 | Jan 2026 |
| SWE-bench Verified score | 56.4 | — |
| LMArena (Chatbot Arena) Elo score | — | 1403 |
FAQ
Is Devstral Small 2505 or Step 3.5 Flash cheaper?
Devstral Small 2505 and Step 3.5 Flash have comparable output pricing.
Which has the larger context window, Devstral Small 2505 or Step 3.5 Flash?
Step 3.5 Flash has the larger context window (262K tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.