GPT-5 mini costs $0.250/1M input tokens and $2.00/1M output tokens as of 2026-06-27. OpenAI publishes this model with a 400K tokens context window. o10 lists GPT-5 mini on OpenRouter at routing band C0. API slug openai-gpt-5-mini. 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 mini. Price, context, and routing

AnswersSelf-contained

What is GPT-5 mini?

GPT-5 mini is a chat model from openai (slug: openai-gpt-5-mini). Pick GPT-5 mini as the cheap OpenAI default for high-volume chat. It is the cost-cut sibling of the matching full GPT SKU. Published input pricing starts at $0.250/1M tokens. Context window: 400K tokens.

Catalog snapshot 2026-06-27.

When should you pick GPT-5 mini?

Pick GPT-5 mini as the cheap OpenAI default for high-volume chat. It is the cost-cut sibling of the matching full GPT SKU. GPT-5 mini trades some reasoning depth for price. Promote to the full GPT SKU when quality floor evals fail.

How does GPT-5 mini differ from sibling models?

GPT-5 mini trades some reasoning depth for price. Promote to the full GPT SKU when quality floor evals fail.

How much does GPT-5 mini cost per million tokens?

GPT-5 mini costs $0.250/1M input tokens and $2.00/1M 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 mini?

GPT-5 mini is configured on OpenRouter. Known host IDs: openrouter: openrouter/openai/gpt-5-mini. This model is routable through o10 eval-gated routing.

What is GPT-5 mini's context window?

GPT-5 mini 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 mini?

GPT-5 mini is classified at o10 routing band C0. 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 mini?

GPT-5 mini is attributed to source provider openai in the o10 catalog. Fulfillment hosts (OpenRouter) supply API access; list pricing may differ by venue.

01Deep dive

Specifications

GPT-5 mini in the o10 unified catalog.

GPT-5 mini specifications
FieldValue
o10 slug`openai-gpt-5-mini`
Typetext
BandC0
RoutableYes
Source provideropenai
Primary hostOpenRouter
Gateway ID`openai/gpt-5-mini`
Context window400,000 tokens
Released2025-08-07
02Deep dive

Token pricing

Gateway snapshot pricing for GPT-5 mini.

GPT-5 mini token pricing
UnitPrice
Input$0.25/1M tokens
Output$2/1M tokens
03Deep dive

Fulfillment hosts

Upstream venues configured for GPT-5 mini.

GPT-5 mini fulfillment routes
HostUpstream model ID
openrouteropenrouter/openai/gpt-5-mini
04Deep dive

Gateway provider endpoints

Endpoint-level pricing and latency from the gateway catalog.

GPT-5 mini gateway endpoints
ProviderInput ($/1M)Latency p50Uptime 1d
azure$0.254525ms10000.0%
openai$0.253210ms9996.2%
05Deep dive

Routing with o10

Eval-gated model selection for this slug.

o10 slug: openai-gpt-5-mini. Band: C0. Routable: yes.

See [/models/routing](/models/routing) for smart aliases (o10/auto, o10/frontier, o10/squad) 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 mini cost?

GPT-5 mini costs $0.250/1M input tokens and $2.00/1M output tokens in the gateway snapshot (2026-06-27). Verify against your provider's published pricing.

What is GPT-5 mini's context window?

GPT-5 mini supports 400K tokens in the gateway catalog snapshot. Host-specific endpoints may differ.

Which hosts serve GPT-5 mini?

GPT-5 mini (openai-gpt-5-mini) is configured on: OpenRouter. Upstream model IDs are listed in the fulfillment routes section.

Is GPT-5 mini routable through o10?

Yes. GPT-5 mini is routable at band C0. Send model: "openai-gpt-5-mini" or use an o10 smart routing alias.

How do I call GPT-5 mini via o10?

Use o10 slug "openai-gpt-5-mini" or gateway ID "openai/gpt-5-mini" depending on your integration. Gateway-compatible endpoints accept OpenAI-style /v1 requests.

How does o10 route this model?

o10 routes GPT-5 mini only when per-use-case evals clear at your quality floor. Band C0 indicates cost tier. See /kyi for governance and /models/routing for smart aliases.

What is the API model ID for GPT-5 mini?

The o10 slug is "openai-gpt-5-mini"; the unified gateway ID is "openai/gpt-5-mini". Host IDs: openrouter: openrouter/openai/gpt-5-mini. Pricing snapshot date: 2026-06-27.

Who hosts GPT-5 mini?

GPT-5 mini is hosted as openrouter: openrouter/openai/gpt-5-mini. o10 maps those upstream IDs to slug "openai-gpt-5-mini".