Step 3.5 Flash
Context
262K
Max output
n/a
Serving providers
1
Cheapest input
$0.10 /1M
Prices are on-demand list rates. Enterprise commitments (committed-use discounts, provisioned throughput, negotiated rates) can be materially lower.
Benchmarks
independent evaluations · source: Artificial Analysis and Hugging Face leaderboardsSpeed & latency
Output speed
227 t/s
tokens / second
Time to first token
1.14s
latency
Headline indices
Individual benchmarks · click a row for effort variants
| Benchmark | Best score | Effort | Cost / task | |
|---|---|---|---|---|
| AIME 2026 | 97% | default | — | |
| CritPt | 2% | default | — | |
| GPQA Diamond | 83% | default | — | |
| Humanity's Last Exam | 24% | default | — | |
| IFBench | 67% | default | — | |
| Long-Context Reasoning | 60% | default | — | |
| Omniscience | -44.2 | default | — | |
| Omniscience Accuracy | 0.2 | default | — | |
| Omniscience Non Hallucination | 0.1 | default | — | |
| SciCode | 39% | default | — | |
| SWE-bench Verified | 74% | default | — | |
| TerminalBench Hard | 33% | default | — | |
| τ²-bench | 87% | default | — |
Pricing by serving provider
standard tier · per 1M tokens · click a provider to expand| Serving provider | Input /1M | Output /1M | Endpoints | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| OpenRouterCheapest | $0.10 | $0.30 | 1 | |||||||||||||
| ||||||||||||||||
Price history
input + output $/1M since we started tracking Input Output
Price history is accruing. We record a point each day a price changes; the full backfill lands shortly.
Cost calculator
estimate your monthly spend on this model$44
estimated / month
Model IDs
copy the exact identifier for your platformstepfun/step-3.5-flash
Frequently asked questions
Step 3.5 Flash pricing, context and availabilityHow much does Step 3.5 Flash cost?
Step 3.5 Flash costs $0.10 per 1M input tokens and $0.30 per 1M output tokens at its cheapest provider via OpenRouter.
What is the context window of Step 3.5 Flash?
Step 3.5 Flash accepts up to 262K tokens of context.
Other Other models
compare pricing across the Other lineup Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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