Kimi K2.5 vs Step-3.5-Flash: Specs & Benchmark Comparison
| Characteristic | Kimi K2.5 | Step-3.5-Flash |
|---|---|---|
| Company | Moonshot AI | StepFun |
| Release Date | January 26, 2026 | February 1, 2026 |
| Parameters | 1.0T | 196B |
| Multimodal | Yes | Yes |
| Context (input) | — | 66K |
| Context (output) | — | 8K |
| Input Price / 1M | — | $0.10 |
| Output Price / 1M | — | $0.40 |
| Average Score | 0.9 | 0.8 |
| Benchmarks | ||
| AIME 2025 | 1.0 | 1.0 |
Visual Benchmark Comparison
Kimi K2.5
Step-3.5-Flash
AIME 20251.0 vs 1.0
1.0
1.0
Verdict
Both models show equal results — the choice depends on your specific use case.
Overall Performance
Both models show comparable average scores: Kimi K2.5 — 0.9, Step-3.5-Flash — 0.8.
Recency
Both models were released around the same time: 1/26/2026 and 2/1/2026.
More About These Models
Related Comparisons
The Kimi K2.5 and Step-3.5-Flash comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Kimi K2.5 or Step-3.5-Flash page. See also the complete list of AI model comparisons.