Claude Opus 5.5 vs Step 3.7 Flash

Price, context window & benchmark comparison

A

Claude Opus 5.5

Anthropic
$4.00 / $20.00
Input / Output · per 1M tokens
VS
S

Step 3.7 Flash

StepFun
$0.20 / $1.15
Input / Output · per 1M tokens
Compare different models
A
S
Verdict: Step 3.7 Flash is 18.3× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix. Claude Opus 5.5 has the larger context window (1M vs 262K).
Claude Opus 5.5Step 3.7 Flash
Input price / 1M$4.00$0.20
Output price / 1M$20.00$1.15
Blended price (3:1)$8.00$0.44
Cached input / 1M$0.20$0.04
Context window1M262K
Max output128K230K
Intelligence index57.6—
Coding index—39.6
Providers11—
Best provider uptime (30m)100.0%—
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-09-222026-05-28
Retirement——

Cost calculator

FAQ

Which is cheaper, Claude Opus 5.5 or Step 3.7 Flash?

Step 3.7 Flash is 18.3× cheaper than Claude Opus 5.5 on a typical 3:1 input/output mix.

Claude Opus 5.5 vs Step 3.7 Flash: which has a bigger context window?

Claude Opus 5.5: 1,000,000 tokens. Step 3.7 Flash: 262,144 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Claude Opus 5.5 ≈ $18,000, Step 3.7 Flash ≈ $975.00.

More comparisons

Claude Opus 5.5 vs GLM 5.3 PrimeClaude Opus 5.5 vs Qwen3.8 Max PrimeClaude Opus 5.5 vs Command A+Claude Opus 5.5 vs GPT-6 Luna ProClaude Opus 5.5 vs GPT-6 LunaClaude Opus 5.5 vs GPT-6 Sol ProClaude Opus 5.5 vs GPT-6 SolClaude Opus 5.5 vs MiMo-V2.6-Pro-UltraSpeedClaude Opus 5.5 vs MiMo-V2.6-FlashClaude Opus 5.5 vs Grok 4.7Claude Opus 5.5 vs Qwen3.8 Omni FlashClaude Opus 5.5 vs GLM 5.3 FlashXClaude Opus 5.5 vs DeepSeek V4.1 FlashClaude Opus 5.5 vs GPT-6 AstraClaude Opus 5.5 vs GPT-6 Astra ProClaude Opus 5.5 vs Qwen3.8 Max (0902)Step 3.7 Flash vs GLM 5.3 PrimeStep 3.7 Flash vs Qwen3.8 Max PrimeStep 3.7 Flash vs Command A+Step 3.7 Flash vs GPT-6 Luna ProStep 3.7 Flash vs GPT-6 LunaStep 3.7 Flash vs GPT-6 Sol ProStep 3.7 Flash vs GPT-6 SolStep 3.7 Flash vs MiMo-V2.6-Pro-UltraSpeed