Anthropic

Claude Sonnet 5

Claude Sonnet 5 is a Claude 5 model from Anthropic, released in 2026-06. It costs $3 / $15 per 1M, has a 1M-token context window, and is best for coding, agents, rag. Last verified 2026-07-11.

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Spec sheet

Pricing

Input
$3 / 1M
Output
$15 / 1M
Cached input
$0.3 / 1M
Batch discount
50%
Free tier
No

Context & speed

Context window
1M tokens
Max output
128k tokens
Throughput
~90 tok/s
Time to first token
~550 ms
Speed tier
balanced

Capabilities

Tool use
Yes
Structured output
Yes
Prompt caching
Yes
Extended thinking
Yes
Vision input
Yes
Audio in / out
No
Fine-tuning
No

Deployment

Open weights
No
On-prem
No
HIPAA eligible
Yes
Zero retention
Yes
Regions
us, eu

Estimated monthly cost

Assumes typical token shape: 2k input, 600 output per call. Prompt caching is excluded from these figures.

10k calls/mo
$150.00
per month
100k calls/mo
$1.5k
per month
1M calls/mo
$15k
per month

When to use Claude Sonnet 5

Sweet spot

  • coding
  • agents
  • rag
  • long documents
  • general production

Known trade-offs

  • slightly below Opus on hardest reasoning

Best use cases

Best LLM for Autonomous agents

Best-in-class tool use + long-horizon planning (τ-bench leader)

Best LLM for Coding assistant

Current benchmark leader on real-world coding + agents

Best LLM for Long documents (100k+ tokens)

1M context with excellent retrieval + prompt caching

Best LLM for RAG

1M context + prompt caching (up to 90% cost cut on repeat prompts)

Best LLM for Vision

Best for UI/document understanding and diagrams

Best LLM for Content writing

Nearly as good as Opus, 5× cheaper

Works with

Anthropic SDKClaude CodeCursorAWS BedrockGoogle Vertex AIVercel AI SDKLangChainLlamaIndexOpenRouter

Compare Claude Sonnet 5 to other models

vs GPT-5.6 Terravs Gemini 3.1 Provs Gemini 3.5 Flashvs Qwen3.7-Maxvs GPT-5.6 Lunavs GPT Realtime 2

FAQ — Claude Sonnet 5

How much does Claude Sonnet 5 cost?

Claude Sonnet 5 costs $3 / $15 per 1M tokens on the Anthropic API. Cached input reads cost $0.3 per 1M, cutting the input bill by roughly 90% on repeat system prompts. The batch API offers a 50% discount for async workloads.

What is the context window of Claude Sonnet 5?

Claude Sonnet 5 has a 1M-token context window with up to 128k tokens of output. That's enough for entire codebases, long transcripts, or multi-document RAG.

Does Claude Sonnet 5 have a free tier?

No — Default model on Claude.ai Free/Pro web chat; API requires paid credits.

Is Claude Sonnet 5 HIPAA / EU / on-prem friendly?

Claude Sonnet 5 is HIPAA-eligible, available in EU regions, and is API-only. Zero data retention is available for enterprise customers.

What is Claude Sonnet 5 best for?

Claude Sonnet 5 is best for coding, agents, rag, long documents. Trade-offs to be aware of: slightly below Opus on hardest reasoning.

Which tools and SDKs work with Claude Sonnet 5?

Claude Sonnet 5 integrates with Anthropic SDK, Claude Code, Cursor, AWS Bedrock, Google Vertex AI, Vercel AI SDK, LangChain, LlamaIndex, OpenRouter. Most major AI frameworks support it either natively or through OpenAI-compatible endpoints.