# Claude Opus 4.5

> Claude Opus 4.5 is a proprietary language model from Anthropic, released on 24 Nov 2025. It accepts text, images and PDFs and generates text, with a 200K-token context window and up to 64K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $5 per million input tokens and $25 per million output tokens (Claude API), across 9 providers we track.

Source page: https://www.aimodel.directory/models/claude-opus-4-5
Last verified: 4 Oct 2026

## Specifications

- **Developer:** Anthropic
- **Release date:** 24 Nov 2025 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/anthropic/models/claude-opus-4-5.toml)
- **Status:** Generally available (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/anthropic/models/claude-opus-4-5.toml)
- **Weights:** Proprietary (API only) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/anthropic/models/claude-opus-4-5.toml)
- **Context window:** 200K (200,000 tokens) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/anthropic/models/claude-opus-4-5.toml)
- **Max output:** 64K tokens (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/anthropic/models/claude-opus-4-5.toml)
- **Knowledge cutoff:** May 2025 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/anthropic/models/claude-opus-4-5.toml)
- **Input:** Text, images and PDFs (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/anthropic/models/claude-opus-4-5.toml)
- **Output:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/anthropic/models/claude-opus-4-5.toml)
- **Reasoning mode:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/anthropic/models/claude-opus-4-5.toml)
- **Tool calling:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/anthropic/models/claude-opus-4-5.toml)
- **Structured output:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/anthropic/models/claude-opus-4-5.toml)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|
| Claude API | $5 | $25 | $0.50 | 200K |
| Claude API | $5 | $25 | $0.50 | 200K |
| Azure AI Foundry | $5 | $25 | $0.50 | 200K |
| Vertex AI (Claude) | $5 | $25 | $0.50 | 200K |
| Databricks | $5 | $25 | $0.50 | 200K |
| Amazon Bedrock | $5 | $25 | $0.50 | 200K |
| Amazon Bedrock | $5 | $25 | $0.50 | 200K |
| Google Vertex AI | $5 | $25 | $0.50 | 200K |
| OpenRouter | $5 | $25 | $0.50 | 200K |
| Vercel AI Gateway | $5 | $25 | $0.50 | 200K |
| Amazon Bedrock | $5.50 | $27.50 | $0.55 | 200K |
| Amazon Bedrock | $5.50 | $27.50 | $0.55 | 200K |
| Snowflake Cortex | – | – | – | 200K |

## FAQ

### What is the context window of Claude Opus 4.5?

Claude Opus 4.5 has a context window of 200,000 tokens (200K) and can generate up to 64,000 tokens in a single response, according to models.dev.

### How much does the Claude Opus 4.5 API cost?

Through Claude API, Claude Opus 4.5 costs $5 per million input tokens and $25 per million output tokens. Prices last verified 4 Oct 2026.

### Is Claude Opus 4.5 open source?

No. Claude Opus 4.5 is a proprietary model; Anthropic has not released its weights. It is available through APIs including Claude API, Azure AI Foundry, Vertex AI (Claude), Databricks.

### When was Claude Opus 4.5 released?

Anthropic released Claude Opus 4.5 on 24 Nov 2025, according to models.dev.

### Which providers offer Claude Opus 4.5?

We track Claude Opus 4.5 on 9 providers: Claude API, Azure AI Foundry, Vertex AI (Claude), Databricks, Amazon Bedrock, Google Vertex AI, OpenRouter, Vercel AI Gateway, Snowflake Cortex.

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Data licensed CC BY 4.0. Cite as: AI Model Directory, "Claude Opus 4.5", https://www.aimodel.directory/models/claude-opus-4-5