Claude Fable 5$22.000/MClaude Opus 4.8$11.000/MClaude Opus 4.7$11.000/MClaude Opus 4.6$11.000/MClaude Opus 4.5$33.000/MClaude Sonnet 3.7$6.600/MClaude Opus 3$33.000/MClaude 2.1$12.800/MClaude 2$12.800/MGPT-5.5$12.500/MGPT-5.2$5.425/MGPT-5.2-Codex$5.425/MGPT-5$3.875/MGPT-4.5$97.500/MGPT-4 Turbo Preview$16.000/MGPT-4$39.000/MGPT-4-32k$78.000/Mo3$19.000/Mo3-mini$2.090/Mo4-mini$2.090/Mo1$28.500/Mo1-mini$5.700/Mo1-preview$28.500/MGemini 3.5 Pro$5.000/MGemini 3.1 Pro$5.000/MGemini 3 Pro$5.000/MGemini 2.5 Pro$3.875/MGemini 1.5 Pro$2.375/MGemini 1.0 Ultra$12.000/MGemini 1.0 Pro$0.800/MClaude Fable 5$22.000/MClaude Opus 4.8$11.000/MClaude Opus 4.7$11.000/MClaude Opus 4.6$11.000/MClaude Opus 4.5$33.000/MClaude Sonnet 3.7$6.600/MClaude Opus 3$33.000/MClaude 2.1$12.800/MClaude 2$12.800/MGPT-5.5$12.500/MGPT-5.2$5.425/MGPT-5.2-Codex$5.425/MGPT-5$3.875/MGPT-4.5$97.500/MGPT-4 Turbo Preview$16.000/MGPT-4$39.000/MGPT-4-32k$78.000/Mo3$19.000/Mo3-mini$2.090/Mo4-mini$2.090/Mo1$28.500/Mo1-mini$5.700/Mo1-preview$28.500/MGemini 3.5 Pro$5.000/MGemini 3.1 Pro$5.000/MGemini 3 Pro$5.000/MGemini 2.5 Pro$3.875/MGemini 1.5 Pro$2.375/MGemini 1.0 Ultra$12.000/MGemini 1.0 Pro$0.800/M
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EfficientAUTO PROFILELIVE INDEX

Step 3.5 Flash

text->text

Step 3.5 Flash is a compact variant — chosen for high throughput and low cost rather than absolute capability. Available via stepfun. 262K-token context. Budget pricing.

Step 3.5 Flash is a efficient AI model from stepfun. It costs $0.090 per million input tokens and $0.300 per million output tokens (blended $0.153/M), with a 262K-token context window.

Modalities textPricing source ↗Compare with another model →Estimate monthly cost →
INPUT
$0.090/M
per million input tokens
OUTPUT
$0.300/M
per million output tokens
BLENDED 70/30
$0.153/M
default reference rate · how it's calculated →
CONTEXT
262K
262,144 tokens
What it's good at
  • Sub-second latency
  • Affordable at scale
  • Good for routing & classification
Typical use cases
  • Routing & classification
  • Bulk summarisation
  • Realtime chat UX
Benchmarks
No published benchmark scores tracked for this model yet. Frontier and reasoning models from major providers have scores; smaller models and inference-host variants typically inherit the underlying open-weights score.
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Step 3.7 Flash
text+image+video->text · 256K ctx
in $0.200/Mout $1.150/M
Frequently asked questions

How much does Step 3.5 Flash cost?

Step 3.5 Flash costs $0.090 per million input tokens and $0.300 per million output tokens, for a blended reference rate of $0.153 per million tokens.

What is Step 3.5 Flash's context window?

Step 3.5 Flash supports up to 262K tokens of context (262,144 tokens).

What is Step 3.5 Flash best for?

Step 3.5 Flash is well suited to Sub-second latency, Affordable at scale and Good for routing & classification.

Who makes Step 3.5 Flash?

Step 3.5 Flash is developed and served by stepfun.