Claude Sonnet 4.5
Claude Sonnet 4.5 is the latest evolution in Anthropic’s “Sonnet” line of AI models, aimed at bridging strong performance in code-centric, agentic, and reasoning workloads with improvements in alignment and reliability.
Claude Sonnet 4.5 endpoints
| Method | Endpoint | Description |
|---|---|---|
| POST |
Chat Completion /chat/completions |
Creates a model response for the given chat conversation. |
Claude Sonnet 4.5 pricing
| Plan | Price | Rate limit | Quotas |
|---|---|---|---|
| BASIC | $1 / month | — |
|
| PRO | $5 / month | — |
|
| ULTRA | $25 / month | — |
|
| MEGA Recommended | $75 / month | — |
|