Claude Opus 5
A step change over Opus 4.8 on deep reasoning and long-horizon agentic work, at half Fable 5's price and with the freshest knowledge cutoff in the Claude line. Anthropic's own guidance is that most teams should benchmark Opus 5 before paying for Fable 5.
Pricing checked against provider documentation on . How we verify
claude-opus-5 reasoning Input
$5.00
/ 1M tokens
Output
$25.00
/ 1M tokens
Context
1M
1,000,000 tokens
Max output
128K
tokens per request
What it costs in practice
A workload of 10M input and 2M output tokens per month — roughly a moderately busy production assistant — runs $100.00/month on Claude Opus 5. Routing that same volume through the batch API brings it to $50.00. The next cheaper option, GPT-5.6 Sol , would cost $80.00.
Where Claude Opus 5 fits
- Agentic engineering with a cost ceiling
- Deep research and analysis
- Test-time compute scaling
- Production assistants needing recent knowledge
Specifications
- API model ID
- claude-opus-5
- Provider
- Anthropic
- Model family
- Claude 5
- Released
- August 2026
- Knowledge cutoff
- May 2026
- Context window
- 1,000,000 tokens
- Max output
- 128,000 tokens
- Native reasoning
- Yes
- Relative latency
- medium
- Input modalities
- text, image
- Output modalities
- text
- Open weights
- No
- Cached input
- $0.50 / 1M tokens
- Batch discount
- 50%
Frequently asked
How much does Claude Opus 5 cost?
Claude Opus 5 costs $5.00 per million input tokens and $25.00 per million output tokens, with cached input at $0.50. Batch processing is 50% cheaper.
What is Claude Opus 5's context window?
Claude Opus 5 accepts up to 1,000,000 tokens of context and can generate up to 128,000 output tokens per request.
Is Claude Opus 5 a reasoning model?
Yes. Claude Opus 5 performs native chain-of-thought before answering. Those thinking tokens are billed at the output rate, so budget above the sticker price.
What is Claude Opus 5 best for?
Most teams' best Claude starting point. A step change over Opus 4.8 on deep reasoning and long-horizon agentic work, at half Fable 5's price and with the freshest knowledge cutoff in the Claude line. Anthropic's own guidance is that most teams should benchmark Opus 5 before paying for Fable 5.