Claude Sonnet 4.5 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 4.5 on OpenRouter at routing band C2. API slug anthropic-claude-sonnet-4-5. 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.
Claude Sonnet 4.5 is a chat model from anthropic (slug: anthropic-claude-sonnet-4-5). Pick Claude Sonnet 4.5 when you need Anthropic's mid-frontier coding and writing tier. It is the default Claude workhorse: cheaper than Opus, stronger than Haiku on long-context agent work. Published input pricing starts at $3.00/1M tokens. Context window: 1M tokens.
Catalog snapshot 2026-06-27.
Pick Claude Sonnet 4.5 when you need Anthropic's mid-frontier coding and writing tier. It is the default Claude workhorse: cheaper than Opus, stronger than Haiku on long-context agent work. Claude Sonnet 4.5 sits between Claude Haiku (economy) and Claude Opus (flagship). Move down to Haiku when evals pass at C0/C1; move up to Opus only when the quality floor needs the extra reasoning.
Claude Sonnet 4.5 sits between Claude Haiku (economy) and Claude Opus (flagship). Move down to Haiku when evals pass at C0/C1; move up to Opus only when the quality floor needs the extra reasoning.
Claude Sonnet 4.5 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.
Claude Sonnet 4.5 is configured on OpenRouter. Known host IDs: openrouter: openrouter/anthropic/claude-sonnet-4.5. This model is routable through o10 eval-gated routing.
Claude Sonnet 4.5 supports a 1M tokens context window in the gateway catalog snapshot. Context limits may vary by fulfillment host endpoint.
Claude Sonnet 4.5 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.
Claude Sonnet 4.5 is attributed to source provider anthropic in the o10 catalog. Fulfillment hosts (OpenRouter) supply API access; list pricing may differ by venue.
Claude Sonnet 4.5 in the o10 unified catalog.
| Field | Value |
|---|---|
| o10 slug | `anthropic-claude-sonnet-4-5` |
| Type | text |
| Band | C2 |
| Routable | Yes |
| Source provider | anthropic |
| Primary host | OpenRouter |
| Gateway ID | `anthropic/claude-sonnet-4.5` |
| Context window | 1,000,000 tokens |
| Released | 2025-09-29 |
Gateway snapshot pricing for Claude Sonnet 4.5.
| Unit | Price |
|---|---|
| Input | $3/1M tokens |
| Output | $15/1M tokens |
Upstream venues configured for Claude Sonnet 4.5.
| Host | Upstream model ID |
|---|---|
| openrouter | openrouter/anthropic/claude-sonnet-4.5 |
Endpoint-level pricing and latency from the gateway catalog.
| Provider | Input ($/1M) | Latency p50 | Uptime 1d |
|---|---|---|---|
| anthropic | $3 | 976ms | 9998.5% |
| bedrock | $3 | 1124ms | 9993.4% |
| vertexAnthropic | $3 | 661.5ms | 9999.9% |
Eval-gated model selection for this slug.
o10 slug: anthropic-claude-sonnet-4-5. Band: C2. 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.
Claude Sonnet 4.5 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.
Claude Sonnet 4.5 supports 1M tokens in the gateway catalog snapshot. Host-specific endpoints may differ.
Claude Sonnet 4.5 (anthropic-claude-sonnet-4-5) is configured on: OpenRouter. Upstream model IDs are listed in the fulfillment routes section.
Yes. Claude Sonnet 4.5 is routable at band C2. Send model: "anthropic-claude-sonnet-4-5" or use an o10 smart routing alias.
Use o10 slug "anthropic-claude-sonnet-4-5" or gateway ID "anthropic/claude-sonnet-4.5" depending on your integration. Gateway-compatible endpoints accept OpenAI-style /v1 requests.
o10 routes Claude Sonnet 4.5 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.
The o10 slug is "anthropic-claude-sonnet-4-5"; the unified gateway ID is "anthropic/claude-sonnet-4.5". Host IDs: openrouter: openrouter/anthropic/claude-sonnet-4.5. Pricing snapshot date: 2026-06-27.
Claude Sonnet 4.5 is hosted as openrouter: openrouter/anthropic/claude-sonnet-4.5. o10 maps those upstream IDs to slug "anthropic-claude-sonnet-4-5".