modelgrep

Anthropic: Claude Opus 4.5 vs StepFun: Step 3.7 Flash

AAnthropic: Claude Opus 4.5anthropic/claude-opus-4.5VSSStepFun: Step 3.7 Flashstepfun/step-3.7-flash

Anthropic: Claude Opus 4.5 wins on more metrics (5 of 9), but the right pick depends on what you optimize for — see the breakdown below.

MetricAnthropic: Claude Opus 4.5StepFun: Step 3.7 Flash
Intelligence Index43.1✓42.6
Coding Index42.9✓37.1
GPQA Diamond81%✓81%
Design Arena Elo1297✓1232
Speed (tokens/sec)5874✓
Latency772ms✓1.8s
Input price /M$5.00$0.200✓
Output price /M$25.00$1.15✓
Context window200K256K✓
CapabilitiesReasoningToolsJSONVisionReasoningToolsJSONVision
Anthropic: Claude Opus 4.5 details →StepFun: Step 3.7 Flash details →