Step 3.5 Flash costs $0.090/1M input tokens and $0.300/1M output tokens as of 2026-06-27. Openrouter publishes this model with a 262K tokens context window. o10 lists Step 3.5 Flash on Together AI at routing band C2. API slug step-3.5-flash. Verify list prices against the venue you call.
Last updated: 2026-06-27. Full catalog. Reference prices are dated snapshots. Compare total cost and measured task quality before choosing a route.
Step 3.5 Flash costs $0.090/1M input tokens and $0.300/1M output tokens in the gateway catalog snapshot (2026-06-27). Endpoint pricing may differ by fulfillment host.
Sourced from gateway catalog snapshot.
Step 3.5 Flash is configured on Together AI. Known host IDs: stepfun: together_ai/step-3.5-flash. This model is routable through o10 eval-gated routing.
Step 3.5 Flash supports a 262K tokens context window in the gateway catalog snapshot. Context limits may vary by fulfillment host endpoint.
Gateway snapshot pricing for Step 3.5 Flash.
| Unit | Price |
|---|---|
| Input | $0.09/1M tokens |
| Output | $0.3/1M tokens |
Upstream venues configured for Step 3.5 Flash.
| Host | Upstream model ID |
|---|---|
| stepfun | together_ai/step-3.5-flash |
Eval-gated model selection for this slug.
o10 slug: step-3.5-flash. Band: C2. Routable: yes.
See [/models/routing](/models/routing) for smart aliases (o10/auto, o10/frontier, o10/squad) and [/kyi](/kyi) for governance.
Gateway catalog snapshot 2026-06-27. Fulfillment catalog synced from o10 control plane. Verify list prices against openrouter and host providers.
Step 3.5 Flash costs $0.090/1M input tokens and $0.300/1M output tokens in the gateway snapshot (2026-06-27). Verify against your provider's published pricing.
Step 3.5 Flash supports 262K tokens in the gateway catalog snapshot. Host-specific endpoints may differ.
Step 3.5 Flash (step-3.5-flash) is configured on: Together AI. Upstream model IDs are listed in the fulfillment routes section.
Yes. Step 3.5 Flash is routable at band C2. Send model: "step-3.5-flash" or use an o10 smart routing alias.
Use o10 slug "step-3.5-flash" or gateway ID "stepfun/step-3.5-flash" depending on your integration. Gateway-compatible endpoints accept OpenAI-style /v1 requests.
o10 routes Step 3.5 Flash only when per-use-case evals clear at your quality floor. Band C2 indicates cost tier. See /kyi for governance and /models/routing for smart aliases.