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Flash — fastest and cheapest, lighter reasoningOpen Weights
Step 3.7 Flash Pricing
StepFun · stepfun-step-3-7-flash
Input / 1M tokens
$0.200
Output / 1M tokens
$1.15
Context window
262,144 tokens
≈ 350 pages of text
Max output
256k tokens
What it costs in practice
Typical request (1,200 in + 400 out tokens)$0.0007
1,000 requests / month$0.7/mo10,000 requests / month$7.00/mo100,000 requests / month$70.00/moEstimate your own workloadOpens the calculator with Step 3.7 Flash preloaded — adjust volume and token counts there.
Price history
Only one price point recorded so far.
The staircase chart appears once a price change is detected.
What it excels at
Supports 256k context and output with vision at low input cost; open weights enable custom deployment for high-volume workloads.
The business tradeoff
Limited ecosystem and benchmark data; output pricing is high relative to input and hosting performance varies by implementation.
Cheaper from StepFun
Head-to-head
Vendor list rates, as of Jun 15, 2026 · source: openrouter · per-request examples assume 1,200 input + 400 output tokens.