Anthropic
Claude Opus 4.5
Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use.
At a glance
- Input / 1M
- $5
- Output / 1M
- $25
- Context
- 200K
- Max output
- 64K
- Intelligence
- 29.1
- Released
- Nov 2025
Pricing
Claude Opus 4.5 API pricing
Per-token rates, plus what common tasks actually cost.
| Input tokensPer 1M tokens | $5 |
|---|---|
| Output tokensPer 1M tokens | $25 |
| Cached input (read)Per 1M tokens | $0.50 |
| Cache writePer 1M tokens | $6.25 |
| Web searchPer request | $0.01 |
Chat message
2K in, 500 out
$22.50
per 1,000 requests
Coding task
30K in, 4K out
$250
per 1,000 requests
Long document summary
150K in, 2K out
$800
per 1,000 requests
Benchmarks
Claude Opus 4.5 benchmark scores
Independent scores from Artificial Analysis. Higher is better.
Intelligence index
29.1
Coding index
Not available
Agentic index
Not available
Specs
Context window and capabilities
What it can read, what it can write, and which API features it supports.
- Context window
- 200K tokens
- Max output
- 64K tokens
- Input types
- File, Image, Text
- Output types
- Text
- Reasoning effort
- Not available
- Release date
- November 24, 2025
- Tool calling
- Structured outputs
- JSON mode
- Reasoning
- Temperature
- Stop sequences
- Deterministic seed
- Verbosity control
Compare
Claude Opus 4.5 vs other models
See how Claude Opus 4.5 stacks up head to head on price, benchmarks, and features.
VSClaude Opus 4.5 vs Claude Sonnet 5
Anthropic vs Anthropic
See comparisonVSClaude Opus 4.5 vs GLM 5.2
Anthropic vs Z.ai
See comparisonVS
Claude Opus 4.5 vs GPT-5.3-Codex
Anthropic vs OpenAI
See comparisonVSClaude Opus 4.5 vs Claude Opus 4.6
Anthropic vs Anthropic
See comparisonVSClaude Opus 4.5 vs GPT-5.2
Anthropic vs OpenAI
See comparisonVSClaude Opus 4.5 vs Claude Sonnet 4.6
Anthropic vs Anthropic
See comparisonAlternatives
Claude Opus 4.5 alternatives
Similar models worth considering, and where each one has the edge.
Anthropic
Claude Sonnet 5
Z.ai
GLM 5.2
OpenAI
GPT-5.3-Codex
Want to learn about other models? Browse all models
FAQ
Frequently asked questions
How much does Claude Opus 4.5 cost?
Claude Opus 4.5 costs $5 per 1M input tokens and $25 per 1M output tokens through the API. A typical chat message costs about $22.50 per 1,000 messages.
What is the context window of Claude Opus 4.5?
Claude Opus 4.5 accepts up to 200K tokens of input and can write up to 64K tokens in a single response.
What is the best alternative to Claude Opus 4.5?
Claude Sonnet 5 from Anthropic is a strong alternative. It offers: 2.5x cheaper output, higher intelligence score, larger 1m context.
Can I use Claude Opus 4.5 alongside other models?
Yes. Shortcut Chat sends one prompt to Claude Opus 4.5 and any other models you pick at the same time, so you can compare answers side by side.
Try Claude Opus 4.5 next to every other model.
Use Claude Opus 4.5 alongside all the other models. Use one at a time, or multiple together. Get the best answer from every AI.