Last refreshed 2026-05-15. Next refresh: weekly.
Why use Claude 4 Opus on Anthropic?
Anthropic offers Claude 4 Opus with pay-as-you-go pricing at $15.00/1M input tokens. Anthropic is a safety-focused AI research company and creator of the Claude model family, offering API access through the Anthropic Console for text generation, analysis, and coding tasks.
Compare Claude 4 Opus across 2 providers to find the best fit for your use caseSetup recipe
Python + curlpip install anthropicexport ANTHROPIC_API_KEY=...import anthropic
client = anthropic.Anthropic() # reads ANTHROPIC_API_KEY from env
message = client.messages.create(
model="claude-opus-4-20250514",claude-opus-4-20250514Request example
import anthropic
client = anthropic.Anthropic() # reads ANTHROPIC_API_KEY from env
message = client.messages.create(
model="claude-opus-4-20250514",
max_tokens=1024,
messages=[{"role": "user", "content": "Hello"}]
)
print(message.content[0].text)Gotchas
- Use provider model ID "claude-opus-4-20250514", not the LLMReference slug "claude-4-opus".
- Use the versioned model ID, e.g. "claude-sonnet-4-6" or "claude-opus-4-7-20251101".
- The examples expect ANTHROPIC_API_KEY; rename it only if your application config maps the new variable.
Compare Claude 4 Opus Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| OpenRouter | $15.00 | $75.00 |
| Anthropic | $15.00 | $75.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $15.00 |
| Output tokens | $75.00 |
Capabilities
About Claude 4 Opus
Anthropic Claude 4 Opus API snapshot (claude-opus-4-20250514), deprecated April 14, 2026 with Claude API retirement scheduled for June 15, 2026. Use Claude Opus 4.7 for current integrations.
FAQ
What does Claude 4 Opus cost on Anthropic?
On Anthropic, Claude 4 Opus costs $15.00 per 1M input tokens and $75.00 per 1M output tokens.
What is the context window for Claude 4 Opus on Anthropic?
Claude 4 Opus supports a 200k token context window on Anthropic.
How does Anthropic compare to other Claude 4 Opus providers?
Claude 4 Opus is available from 2 providers. The cheapest input pricing is $15/1M tokens from OpenRouter.
What API model ID do I use for Claude 4 Opus on Anthropic?
Use the model ID claude-opus-4-20250514 when calling Anthropic's API.
Who created Claude 4 Opus?
Claude 4 Opus was created by Anthropic as part of the Claude 4 model family.
Is Claude 4 Opus open source?
Claude 4 Opus is not open source; the seed data lists it as proprietary.