OpenAI compatible API · Attested · Public status

Step 3.5 Flash 2603

Compare every TrustedRouter route for Step 3.5 Flash 2603, including token pricing, context limits, privacy policy, regional availability, measured uptime, and API support.

Verify gateway
Onebase URL to migrate
100sof models and routes
0prompt or output logs. Always.

stepfun/step-3.5-flash-2603

All models

Publisher StepFunstepfun
AI IQ No AI IQ profile matched yet.
Context262,144 tokens
Providers
Credits routes1 provider route
Modes chat
BillingCredits

Current route evidence

Live leaderboard
$0.1055/1MLowest Credits input price
$0.3165/1MLowest Credits output price
2819 msFastest measured p50 TTFT via stepfun
not enough dataHighest measured throughput

Recent provider-route uptime spans 100.00% across 1 route and 1 provider. Price comes from the current Credits catalog. Speed and uptime come from routed probes rather than vendor claims.

Providers serving this model

Sorted by lowest combined prompt and completion price. Use "provider": {"sort": "throughput"} in the request body (or append :nitro to the model id) to route to the fastest provider instead.

Trust boundary: TR router attestation verifies the TrustedRouter gateway only. Provider policy separately describes the upstream model host's retention, confidential compute, and E2EE posture.

Provider Input Cached input Output TR router attested Provider policy
StepFunstepfun $0.1055/1M $0.0211/1M $0.3165/1M yes no verified privacy claim

Compare Step 3.5 Flash 2603

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Questions

What model ID should I use for Step 3.5 Flash 2603?

Use stepfun/step-3.5-flash-2603 as the model field with the TrustedRouter OpenAI-compatible API. Credits routing and provider fallback happen behind that model ID.

Which providers serve Step 3.5 Flash 2603?

TrustedRouter currently lists StepFun for Step 3.5 Flash 2603. Provider availability and routing eligibility can change as catalog and health data update.

How much does Step 3.5 Flash 2603 cost through TrustedRouter?

The current lowest Credits input price is $0.1055/1M and the lowest Credits output price is $0.3165/1M. Prices are per one million tokens and come from the current route catalog.

How do I require zero data retention for Step 3.5 Flash 2603?

Set provider.min_privacy to zdr on the request. TrustedRouter considers only routes with a recorded zero-data-retention posture and fails closed if no eligible route remains.

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