Claude Sonnet 4.5 is Anthropic’s Sonnet model optimized for real-world agents and coding workflows. It scores highly on coding benchmarks like SWE-bench Verified, with improvements in system design, code security, and following specifications. Built for extended autonomous operation, it keeps task continuity across sessions and tracks progress based on facts. It improves tool orchestration, speculative parallel execution, and context and memory management, and it tracks context and token usage across tool calls, which helps in multi-context and long-running workflows. Key use cases include software engineering, cybersecurity, financial analysis, research agents, and other work that needs sustained reasoning and tool use.
$1.50market price $3.00
$0.15market price $0.30
$7.50market price $15.00
Throughput is how fast the model writes (tokens per second, higher is better). Time to first token is how long before the answer starts (lower is better).
Share of requests served without a server error. Client errors (4xx) do not count.
Works with the OpenAI SDK pointed at our base URL. Every parameter is in the API reference.
Daily usage of this model on NagaAI.
Claude Sonnet 4.5 is Anthropic’s Sonnet model optimized for real-world agents and coding workflows. It scores highly on coding benchmarks like SWE-bench Verified, with improvements in system design, code security, and following specifications.
On NagaAI, Claude Sonnet 4.5 costs $1.50 per 1M input tokens and $7.50 per 1M output tokens. You pay only for what you use, with no subscription.
Claude Sonnet 4.5 reads up to 1M tokens in one request, counting the prompt and the answer together.
Yes. Claude Sonnet 4.5 can call your functions as tools and can answer in a JSON schema you give it.
It takes text, images and files as input and returns text.
Create an API key, copy the model ID from the top of this page and send requests with the OpenAI or Anthropic SDK pointed at NagaAI. The API section on this page has a ready example.
Claude Haiku 5.5AnthropicClaude Sonnet 5.5AnthropicClaude Opus 5.5AnthropicClaude Fable 5.1AnthropicClaude Opus 5AnthropicClaude Sonnet 5AnthropicNot enough throughput data