What is Gpt 5 1 Codex?
Gpt 5 1 Codex is a language model in the o10 fulfillment catalog (slug: gpt-5-1-codex). Published input pricing starts at $1.25/1M tokens. Context window: 400K tokens.
Catalog snapshot 2026-06-27.
Gpt 5 1 Codex costs $1.25/1M input tokens and $10.00/1M output tokens as of 2026-06-27. Openrouter publishes this model with a 400K tokens context window. o10 lists Gpt 5 1 Codex on OpenAI at routing band C1.
Last updated: 2026-06-27. Full catalog
Gpt 5 1 Codex — specs, hosts, and routing
AnswersSelf-contained
How much does Gpt 5 1 Codex cost per million tokens?
Gpt 5 1 Codex 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.
Where can you run Gpt 5 1 Codex?
Gpt 5 1 Codex is configured on OpenAI. Each host maps to an upstream model ID listed in the fulfillment routes table. This model is routable through o10 eval-gated routing.
What is Gpt 5 1 Codex's context window?
Gpt 5 1 Codex supports a 400K tokens context window in the gateway catalog snapshot. Context limits may vary by fulfillment host endpoint.
What o10 routing band is Gpt 5 1 Codex?
Gpt 5 1 Codex is classified at o10 routing band C1. 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.
Who makes Gpt 5 1 Codex?
Gpt 5 1 Codex is attributed to source provider openrouter in the o10 catalog. Fulfillment hosts (OpenAI) supply API access; list pricing may differ by venue.
01Deep dive
Specifications
Gpt 5 1 Codex in the o10 unified catalog.
| Field | Value |
|---|---|
| o10 slug | `gpt-5-1-codex` |
| Type | text |
| Band | C1 |
| Routable | Yes |
| Source provider | openrouter |
| Primary host | OpenAI |
| Gateway ID | `openai/gpt-5.1-codex` |
| Context window | 400,000 tokens |
| Released | 2025-11-12 |
02Deep dive
Token pricing
Gateway snapshot pricing for Gpt 5 1 Codex.
| Unit | Price |
|---|---|
| Input | $1.25/1M tokens |
| Output | $10/1M tokens |
03Deep dive
Fulfillment hosts
Upstream venues configured for Gpt 5 1 Codex.
| Host | Upstream model ID |
|---|---|
| openai | openai/gpt-5.1-codex |
04Deep dive
Gateway provider endpoints
Endpoint-level pricing and latency from the gateway catalog.
| Provider | Input ($/1M) | Latency p50 | Uptime 1d |
|---|---|---|---|
| azure | $1.25 | 411ms | 10000.0% |
| openai | $1.25 | 447.5ms | 9986.4% |
05Deep dive
Routing with o10
Eval-gated model selection for this slug.
o10 slug: gpt-5-1-codex. Band: C1. Routable: yes.
See [/models/routing](/models/routing) for smart aliases (o10/auto, o10/economy) and [/kyi](/kyi) for governance.
SourceMethodology
Fulfillment catalog 2026-06-27. Gateway pricing joined where slug match exists.
FAQFrequently asked questions
Common questions
How much does Gpt 5 1 Codex cost?
Gpt 5 1 Codex 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.
What is Gpt 5 1 Codex's context window?
Gpt 5 1 Codex supports 400K tokens in the gateway catalog snapshot. Host-specific endpoints may differ.
Which hosts serve Gpt 5 1 Codex?
Gpt 5 1 Codex (gpt-5-1-codex) is configured on: OpenAI. Upstream model IDs are listed in the fulfillment routes section.
Is Gpt 5 1 Codex routable through o10?
Yes. Gpt 5 1 Codex is routable at band C1. Send model: "gpt-5-1-codex" or use an o10 smart routing alias.
How do I call Gpt 5 1 Codex via o10?
Use o10 slug "gpt-5-1-codex" or gateway ID "openai/gpt-5.1-codex" depending on your integration. Gateway-compatible endpoints accept OpenAI-style /v1 requests.
How does o10 route this model?
o10 routes Gpt 5 1 Codex only when per-use-case evals clear at your quality floor. Band C1 indicates cost tier. See /kyi for governance and /models/routing for smart aliases.