Gpt 5.1 Instant costs $1.25/1M input tokens and $10.00/1M output tokens as of 2026-06-27. Openrouter publishes this model with a 128K tokens context window. o10 lists Gpt 5.1 Instant on OpenAI at routing band C4. API slug gpt-5.1-instant. 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.
Gpt 5.1 Instant is a chat model from openrouter (slug: gpt-5.1-instant). Pick Gpt 5.1 Instant when you need OpenAI's general chat/vision family at this generation. It is the named GPT SKU, not a reasoning-only o-series model. Published input pricing starts at $1.25/1M tokens. Context window: 128K tokens.
Catalog snapshot 2026-06-27.
Pick Gpt 5.1 Instant when you need OpenAI's general chat/vision family at this generation. It is the named GPT SKU, not a reasoning-only o-series model. Gpt 5.1 Instant has cheaper mini/nano siblings for high-volume work. Pin the full SKU only when evals fail on the smaller tier.
Gpt 5.1 Instant has cheaper mini/nano siblings for high-volume work. Pin the full SKU only when evals fail on the smaller tier.
Gpt 5.1 Instant costs $1.25/1M input tokens and $10.00/1M output tokens in the gateway catalog snapshot (2026-06-27). Endpoint pricing may differ by fulfillment host.
Sourced from gateway catalog snapshot.
Gpt 5.1 Instant is configured on OpenAI. Known host IDs: openai: openai/gpt-5.1-instant. This model is routable through o10 eval-gated routing.
Gpt 5.1 Instant supports a 128K tokens context window in the gateway catalog snapshot. Context limits may vary by fulfillment host endpoint.
Gpt 5.1 Instant is classified at o10 routing band C4. Bands group models by cost tier and eval profile: C0 (economy), C1 (standard), C2 (capable), C3/C4 (frontier). Production routing is enabled for this slug.
Gpt 5.1 Instant is attributed to source provider openrouter in the o10 catalog. Fulfillment hosts (OpenAI) supply API access; list pricing may differ by venue.
Gpt 5.1 Instant in the o10 unified catalog.
| Field | Value |
|---|---|
| o10 slug | `gpt-5.1-instant` |
| Type | text |
| Band | C4 |
| Routable | Yes |
| Source provider | openrouter |
| Primary host | OpenAI |
| Gateway ID | `openai/gpt-5.1-instant` |
| Context window | 128,000 tokens |
| Released | 2025-11-12 |
Gateway snapshot pricing for Gpt 5.1 Instant.
| Unit | Price |
|---|---|
| Input | $1.25/1M tokens |
| Output | $10/1M tokens |
Upstream venues configured for Gpt 5.1 Instant.
| Host | Upstream model ID |
|---|---|
| openai | openai/gpt-5.1-instant |
Endpoint-level pricing and latency from the gateway catalog.
| Provider | Input ($/1M) | Latency p50 | Uptime 1d |
|---|---|---|---|
| azure | $1.25 | 708ms | 10000.0% |
| openai | $1.25 | 563.5ms | 9995.8% |
Eval-gated model selection for this slug.
o10 slug: gpt-5.1-instant. Band: C4. Routable: yes.
See [/models/routing](/models/routing) for smart aliases (o10/auto, o10/frontier, o10/squad) and [/kyi](/kyi) for governance.
Fulfillment catalog 2026-06-27. Gateway pricing joined where slug match exists.
Gpt 5.1 Instant costs $1.25/1M input tokens and $10.00/1M output tokens in the gateway snapshot (2026-06-27). Verify against your provider's published pricing.
Gpt 5.1 Instant supports 128K tokens in the gateway catalog snapshot. Host-specific endpoints may differ.
Gpt 5.1 Instant (gpt-5.1-instant) is configured on: OpenAI. Upstream model IDs are listed in the fulfillment routes section.
Yes. Gpt 5.1 Instant is routable at band C4. Send model: "gpt-5.1-instant" or use an o10 smart routing alias.
Use o10 slug "gpt-5.1-instant" or gateway ID "openai/gpt-5.1-instant" depending on your integration. Gateway-compatible endpoints accept OpenAI-style /v1 requests.
o10 routes Gpt 5.1 Instant only when per-use-case evals clear at your quality floor. Band C4 indicates cost tier. See /kyi for governance and /models/routing for smart aliases.