Last refreshed 2026-06-11. Next refresh: weekly.
Why use Claude Mythos 5 on Anthropic?
Anthropic offers Claude Mythos 5 with pay-as-you-go pricing at $10.00/1M 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 Mythos 5 across 3 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-mythos-5",claude-mythos-5Request example
import anthropic
client = anthropic.Anthropic() # reads ANTHROPIC_API_KEY from env
message = client.messages.create(
model="claude-mythos-5",
max_tokens=1024,
messages=[{"role": "user", "content": "Hello"}]
)
print(message.content[0].text)Gotchas
- 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 Mythos 5 Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Anthropic | $10.00 | $50.00 |
| AWS Bedrock | — | — |
| GCP Vertex AI | — | — |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $10.00 |
| Output tokens | $50.00 |
Capabilities
About Claude Mythos 5
Anthropic's access-gated frontier model, available exclusively through Project Glasswing to approved cybersecurity defenders and biomedical research organizations. Shares the same underlying architecture as Claude Fable 5 but operates with safety classifiers lifted in specific domains: cybersecurity safeguards are removed for all Glasswing participants, while biology safeguards are additionally removed for approved biology-track participants. Succeeds Claude Mythos Preview with significantly reduced pricing ($10/$50 per MTok input/output vs. $25/$125 for Mythos Preview), a 1M-token context window, 128k max output tokens, adaptive thinking always on (raw chain of thought never returned), vision, tool use, structured outputs, and the effort parameter for controlling thinking depth. Extended thinking with manual budget_tokens is not supported. For general-availability access to Mythos-class capability, see Claude Fable 5.
FAQ
What does Claude Mythos 5 cost on Anthropic?
On Anthropic, Claude Mythos 5 costs $10.00 per 1M input tokens and $50.00 per 1M output tokens.
What is the context window for Claude Mythos 5 on Anthropic?
Claude Mythos 5 supports a 1m token context window on Anthropic.
How does Anthropic compare to other Claude Mythos 5 providers?
Claude Mythos 5 is available from 3 providers. The cheapest input pricing is $10.00/1M tokens from Anthropic.
What API model ID do I use for Claude Mythos 5 on Anthropic?
Use the model ID claude-mythos-5 when calling Anthropic's API.
Who created Claude Mythos 5?
Claude Mythos 5 was created by Anthropic as part of the Claude Mythos model family.
Is Claude Mythos 5 open source?
Claude Mythos 5 is not open source; the seed data lists it as proprietary.