Claude Opus 4.6 vs Step-3.5-Flash: Specs & Benchmark Comparison
| Characteristic | Claude Opus 4.6 | Step-3.5-Flash |
|---|---|---|
| Company | Anthropic | StepFun |
| Release Date | February 4, 2026 | February 1, 2026 |
| Parameters | — | 196B |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 66K |
| Context (output) | 128K | 8K |
| Input Price / 1M | $5.00 | $0.10 |
| Output Price / 1M | $25.00 | $0.40 |
| Average Score | 0.8 | 0.8 |
| Benchmarks | ||
| SWE-Bench Verified | 0.8 | 0.7 |
| AIME 2025 | 1.0 | 1.0 |
| BrowseComp | 0.7 | 0.7 |
Visual Benchmark Comparison
Claude Opus 4.6
Step-3.5-Flash
SWE-Bench Verified0.8 vs 0.7
0.8
0.7
AIME 20251.0 vs 1.0
1.0
1.0
BrowseComp0.7 vs 0.7
0.7
0.7
Verdict
Both models show equal results — the choice depends on your specific use case.
Overall Performance
Both models show comparable average scores: Claude Opus 4.6 — 0.8, Step-3.5-Flash — 0.8.
Programming
On SWE-Bench, both models are nearly equal: Claude Opus 4.6 — 0.8, Step-3.5-Flash — 0.7.
API Cost
Step-3.5-Flash is 60.0x cheaper: input $0.10/1M vs $5.00/1M tokens.
Context Window
Claude Opus 4.6 supports a larger context: 1M vs 66K tokens.
Recency
Both models were released around the same time: 2/4/2026 and 2/1/2026.
More About These Models
Related Comparisons
The Claude Opus 4.6 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 Claude Opus 4.6 or Step-3.5-Flash page. See also the complete list of AI model comparisons.