Claude Fable 5.2 vs Step 3.7 Flash

Price, context window & benchmark comparison

Anthropic

Claude Fable 5.2

Anthropic
$8.00 / $40.00
Input / Output · per 1M tokens
VS
StepFun

Step 3.7 Flash

StepFun
$0.20 / $1.15
Input / Output · per 1M tokens
Compare different models
Anthropic
StepFun
Verdict: Step 3.7 Flash is 36.6× cheaper than Claude Fable 5.2 on a typical 3:1 input/output mix. Claude Fable 5.2 has the larger context window (1M vs 262K).
Claude Fable 5.2Step 3.7 Flash
Input price / 1M$8.00$0.20
Output price / 1M$40.00$1.15
Blended price (3:1)$16.00$0.44
Cached input / 1M$0.20$0.04
Context window1M262K
Max output128K230K
Intelligence index64.6—
Coding index—39.6
Providers5—
Best provider uptime (30m)100.0%—
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-11-072026-05-28
Retirement——

Cost calculator

FAQ

Which is cheaper, Claude Fable 5.2 or Step 3.7 Flash?

Step 3.7 Flash is 36.6× cheaper than Claude Fable 5.2 on a typical 3:1 input/output mix.

Claude Fable 5.2 vs Step 3.7 Flash: which has a bigger context window?

Claude Fable 5.2: 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 Fable 5.2 ≈ $36,000, Step 3.7 Flash ≈ $975.00.

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