Compare / head-to-head
Claude 3.5 SonnetvsStep 3.7 Flash
Step 3.7 Flash leads 1 of 1 shared benchmark. Step 3.7 Flash has the larger context window (256K tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
0 – 1
Step 3.7 Flash leads
Cheaper per token
—
list price, input + output
Larger context
Step 3.7 Flash
256K tokens
Provider uptime (30d)
100% · —
Anthropic · StepFun
Claude 3.5 Sonnet
Anthropic · released 2024-10-22
textvision
Step 3.7 Flash
StepFun · released 2026-05-29
textvision
- Context
- 256K
- Max out
- —
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 19 · 6 core
Quality
Benchmark matrix
1 shared · 3 only Claude 3.5 Sonnet · 18 only Step 3.7 Flash| Benchmark | Claude 3.5 Sonnet | Step 3.7 Flash | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 1 | ||||
| SWE-bench Verified | 49% ↗ | 76.5% ↗ | -27.5 pt | Step 3.7 Flash |
| Only Claude 3.5 Sonnet reports · 3 | ||||
| GPQA Diamond | 55.3% ↗epoch | not reported | — | — |
| AIME 2025 | 3.3% ↗matharena | not reported | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | 8.5% ↗epoch | not reported | — | — |
| Only Step 3.7 Flash reports · 18 | ||||
| AIME 2026 | not reported | 95% ↗matharena ⚠ | — | — |
| AA-LCR | not reported | 63.9% ↗ | — | — |
| BrowseComp | not reported | 75.8% ↗ | — | — |
| ClawEval v1.1 | not reported | 67.1% ↗ | — | — |
| DeepSearchQA Accuracy | not reported | 81.7% ↗ | — | — |
| DeepSearchQA F1 | not reported | 92.8% ↗ | — | — |
| GDPval-Stirrup | not reported | 1415.8 ↗ | — | — |
| GDPval-Stirrup Intelligence Index | not reported | 45.8 ↗ | — | — |
| HLE (with tools, text-only) | not reported | 49.7% ↗ | — | — |
| HLE (with tools) | not reported | 47.2% ↗ | — | — |
| ResearchRubrics | not reported | 71.7% ↗ | — | — |
| SimpleVQA (with tools) | not reported | 79.2% ↗ | — | — |
| SWE-bench Multilingual | not reported | 72.4% ↗ | — | — |
| SWE-bench Pro | not reported | 56.3% ↗ | — | — |
| Terminal-Bench 2.1 | not reported | 59.6% ↗ | — | — |
| Toolathlon | not reported | 49.5% ↗ | — | — |
| V* (with Python) | not reported | 95.3% ↗ | — | — |
| WorldVQA (with visual search) | not reported | 58.1% ↗ | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is Claude 3.5 Sonnet minus Step 3.7 Flash in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | Claude 3.5 Sonnet | Step 3.7 Flash | Edge |
|---|---|---|---|
| Context window | 200K tokens | 256K tokens | Step 3.7 Flash |
| Max output | 8K tokens | — | — |
| Input price / 1M | $3 ↗ | — | — |
| Output price / 1M | $15 ↗ | — | — |
| Cached input / 1M | $0.3 ↗ | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $18 | — | — |
| Modalities | text · vision | text · vision | Tie |
| Released | 2024-10-22 | 2026-05-29 | — |
| Cited benchmark scores | 4 | 19 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
Claude 3.5 Sonnet vs …
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Step 3.7 Flash vs …
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