Anthropic: Claude-Opus-4
Claude-Opus-4 is a reasoning model from Anthropic released on May 14, 2025. It reads text, images and files and writes text, with a 193K token context window and up to 29K tokens per reply.
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It costs $15 per million input tokens and $75 per million output tokens.
It supports tool calling and structured JSON output.
5 providers serve it, including Poe, Jiekou.AI and Abacus. The lowest input price is $13 per million tokens at Poe.
- Modalities
- In / out price
- $15 / $75 per 1M
- Context
- 193K
- Max output
- 29K
- Released
- May 14, 2025
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Claude-Opus-4 pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $15 / 1M tokens | |
|---|---|---|
| Output | $75 / 1M tokens |
Claude-Opus-4 providers
5 providers serve it, including Poe, Jiekou.AI and Abacus. The lowest input price is $13 per million tokens at Poe. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Poe | $13 | $64 | $1.30 | 193K | 29K |
| Jiekou.AI | $13.50 | $67.50 | – | 200K | 32K |
| Abacus | $15 | $75 | – | 200K | 32K |
| Helicone | $15 | $75 | $1.50 | 200K | 32K |
| ZenMux | $15 | $75 | $1.50 | 200K | 32K |
What Claude-Opus-4 costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Claude-Opus-4 through an OpenAI compatible API.
- Tools
tools - Structured outputs
structured_outputs - Reasoning
reasoning
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Claude-Opus-4 questions
How much does the Claude-Opus-4 API cost?
$15 per million input tokens and $75 per million output tokens. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Claude-Opus-4?
192,512 tokens of input, and it can write up to 28,672 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Claude-Opus-4?
5 providers serve it, including Poe, Jiekou.AI and Abacus. The lowest input price is $13 per million tokens at Poe. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Claude-Opus-4 support tool calling?
Yes. It accepts tool definitions and can return JSON that matches a schema, which is what an agent needs to call your APIs.
Is Claude-Opus-4 open source?
No. Anthropic serves it through an API only, so you cannot download the weights or host it yourself.
When was Claude-Opus-4 released?
May 14, 2025.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Claude-Opus-4?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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