What is Claude Sonnet 4?
Claude Sonnet 4 is a language model in the o10 fulfillment catalog (slug: anthropic-claude-sonnet-4). Published input pricing starts at $3.00/1M tokens. Context window: 1M tokens.
Catalog snapshot 2026-06-27.
Claude Sonnet 4 costs $3.00/1M input tokens and $15.00/1M output tokens as of 2026-06-27. Anthropic publishes this model with a 1M tokens context window. o10 lists Claude Sonnet 4 on OpenRouter at routing band C2.
Last updated: 2026-06-27. Full catalog
Claude Sonnet 4 — specs, hosts, and routing
AnswersSelf-contained
How much does Claude Sonnet 4 cost per million tokens?
Claude Sonnet 4 costs $3.00/1M input tokens and $15.00/1M 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 Claude Sonnet 4?
Claude Sonnet 4 is configured on OpenRouter. 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 Claude Sonnet 4's context window?
Claude Sonnet 4 supports a 1M tokens context window in the gateway catalog snapshot. Context limits may vary by fulfillment host endpoint.
What o10 routing band is Claude Sonnet 4?
Claude Sonnet 4 is classified at o10 routing band C2. 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 Claude Sonnet 4?
Claude Sonnet 4 is attributed to source provider anthropic in the o10 catalog. Fulfillment hosts (OpenRouter) supply API access; list pricing may differ by venue.
01Deep dive
Specifications
Claude Sonnet 4 in the o10 unified catalog.
| Field | Value |
|---|---|
| o10 slug | `anthropic-claude-sonnet-4` |
| Type | text |
| Band | C2 |
| Routable | Yes |
| Source provider | anthropic |
| Primary host | OpenRouter |
| Gateway ID | `anthropic/claude-sonnet-4` |
| Context window | 1,000,000 tokens |
| Released | 2025-05-22 |
02Deep dive
Token pricing
Gateway snapshot pricing for Claude Sonnet 4.
| Unit | Price |
|---|---|
| Input | $3/1M tokens |
| Output | $15/1M tokens |
03Deep dive
Fulfillment hosts
Upstream venues configured for Claude Sonnet 4.
| Host | Upstream model ID |
|---|---|
| openrouter | openrouter/anthropic/claude-sonnet-4 |
04Deep dive
Gateway provider endpoints
Endpoint-level pricing and latency from the gateway catalog.
| Provider | Input ($/1M) | Latency p50 | Uptime 1d |
|---|---|---|---|
| anthropic | $3 | 1380.5ms | 9993.9% |
| bedrock | $3 | 919ms | 10000.0% |
| vertexAnthropic | $3 | 603.5ms | 10000.0% |
05Deep dive
Routing with o10
Eval-gated model selection for this slug.
o10 slug: anthropic-claude-sonnet-4. Band: C2. 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 Claude Sonnet 4 cost?
Claude Sonnet 4 costs $3.00/1M input tokens and $15.00/1M output tokens in the gateway snapshot (2026-06-27). Verify against your provider's published pricing.
What is Claude Sonnet 4's context window?
Claude Sonnet 4 supports 1M tokens in the gateway catalog snapshot. Host-specific endpoints may differ.
Which hosts serve Claude Sonnet 4?
Claude Sonnet 4 (anthropic-claude-sonnet-4) is configured on: OpenRouter. Upstream model IDs are listed in the fulfillment routes section.
Is Claude Sonnet 4 routable through o10?
Yes. Claude Sonnet 4 is routable at band C2. Send model: "anthropic-claude-sonnet-4" or use an o10 smart routing alias.
How do I call Claude Sonnet 4 via o10?
Use o10 slug "anthropic-claude-sonnet-4" or gateway ID "anthropic/claude-sonnet-4" depending on your integration. Gateway-compatible endpoints accept OpenAI-style /v1 requests.
How does o10 route this model?
o10 routes Claude Sonnet 4 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.
What is the API model ID for Claude Sonnet 4?
The o10 slug is "anthropic-claude-sonnet-4"; the unified gateway ID is "anthropic/claude-sonnet-4". Pricing snapshot date: 2026-06-27.