Claude Sonnet 4.5
by AnthropicChatretires 2026-11-30
Balanced Claude model for coding, analysis, agent workflows, and cost control
- Context
- 200K tokens
- Max output
- 64,000 tokens
- Released
- 2025-09-29
- Weights
- Closed
anthropic/claude-sonnet-4-5 · also seen as claude-sonnet-4-5-20250929, anthropic-claude-4.5-sonnet, databricks-claude-sonnet-4-5, claude-sonnet-4-5-think, +23 more
Specifications
Full facts as recorded, incl. what is unknown.
- Released
- 2025-09-29
- Weights
- Closed
- Input
- Text, Image, PDF
- Output
- Text
- Context window
- 200,000 max across endpoints
- Max output
- 64,000
- Providers
- 20 + 26 gateways, not counted as providers
- Epoch Capabilities Index
- 146.8 ± 1.6 against price
- Direct price range
- $3.00–$4.13 in · $15.00–$20.63 out per 1M tokens · 13 of 20 providers have a comparable price
More details
- Last updated
- 2026-06-11
- Knowledge cutoff
- 2025-07-31
- Developer country
- United States of America
Capabilities
Across all endpoints: supported if any endpoint supports it.
- Tool calling
- Parallel tools
- Structured output
- Reasoning
- Image input
- PDF input
- Audio input
- Audio outputunknown
- Video input
- Prompt caching
- Web search
- Computer use
- System messages
- Assistant prefill
- Temperature
- Streamingunknown
- Attachments
Endpoints
One row per provider and variant; gateways are listed separately.
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Price history
Atom feedNo change since 19 Oct 2026. The cheapest direct price has been $3.00 in / $15 out per 1M tokens at Amazon Bedrock on every data refresh since then.
Tracked from 19 Oct 2026, the earliest refresh this model's headline price can be rebuilt from. Headline-eligible direct prices only, so a price the sanity check flags never draws a spike. Series as JSON
Cost calculator
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Similarly priced models
Blended rate per 1M tokens, each at its own cheapest provider (10M input : 2M output mix).
| Model | Blended/1M | In/1M | Out/1M | Context | vs Claude Sonnet 4.5 |
|---|---|---|---|---|---|
| Claude Sonnet 4Anthropic | $4.50 | $2.70 | $13.50 | 200K | +0% |
| Grok 4xAI | $4.50 | $2.70 | $13.50 | 256K | +0% |
| GPT-5.6 SolOpenAI | $4.58 | $2.50 | $15 | 1.05M | +2% |
| Nova PremierAmazon | $4.17 | $2.50 | $12.50 | 1M | −7% cheaper |
| Claude Sonnet 3.5Anthropic | $5.00 | $3.00 | $15 | 200K | +11% |
| Claude Sonnet 3.7Anthropic | $5.00 | $3.00 | $15 | 200K | +11% |
| Claude Sonnet 4.6Anthropic | $5.00 | $3.00 | $15 | 1M | +11% |
| Sonar ProPerplexity | $5.00 | $3.00 | $15 | 200K | +11% |
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Newest Anthropic models in the catalogue. All Anthropic models
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|---|---|---|---|
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| Claude Sonnet 5.5 | 2026-09-28 | 1M | from $2.00 |
| Claude Opus 5.5 | 2026-09-22 | 1M | from $4.00 |
| Claude Fable 5.1 | 2026-09-01 | 1M | from $10 |
| Claude Opus 5 | 2026-07-24 | 1M | from $5.00 |
| Claude Sonnet 5 | 2026-06-29 | 1M | from $2.00 |
| Claude Mythos 5 | 2026-06-09 | 1M | from $10 |
| Claude Fable Latest | 2026-06-09 | 1M | $10 via NanoGPT |