Last refreshed 2026-06-28. Next refresh: weekly.
Why use Claude Mythos 5 on AWS Bedrock?
AWS Bedrock offers Claude Mythos 5 with competitive pricing. AWS Bedrock is Amazon's fully managed foundation-model service, providing unified API access to top models from Anthropic, Meta, Mistral, and other leading AI labs with built-in tools for RAG, fine-tuning, and AI agent development.
Compare Claude Mythos 5 across 3 providers to find the best fit for your use caseSetup recipe
Python + curlpip install boto3export AWS_ACCESS_KEY_ID=...import boto3
client = boto3.client("bedrock-runtime", region_name="us-east-1")
response = client.converse(
modelId="claude-mythos-5",claude-mythos-5Request example
import boto3
# Reads AWS_ACCESS_KEY_ID, AWS_SECRET_ACCESS_KEY, AWS_DEFAULT_REGION from env
client = boto3.client("bedrock-runtime", region_name="us-east-1")
response = client.converse(
modelId="claude-mythos-5",
messages=[{
"role": "user",
"content": [{"text": "Hello"}]
}]
)
print(response["output"]["message"]["content"][0]["text"])Gotchas
- Use Amazon Bedrock model IDs, e.g. "anthropic.claude-3-opus-20240229-v1:0" for on-demand, or cross-region inference profile IDs like "us.anthropic.claude-opus-4-7-20251101-v1:0". These differ from the public model slug.
- The endpoint template includes a region segment; set the same region in your SDK/client configuration.
- The examples expect AWS_ACCESS_KEY_ID; 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 | — | — |
Capabilities
About Claude Mythos 5
Anthropic's access-gated frontier model for approved Project Glasswing 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. Anthropic disabled Mythos 5 access for all customers on June 12, 2026 after a US export control directive. On June 27, 2026, the US Commerce Department partially lifted the restriction, permitting Mythos 5 deployment to approximately 100+ US organizations listed in government Annex A that operate and defend critical infrastructure. The model remains inaccessible to general commercial API customers as of June 28, 2026.
FAQ
What is the context window for Claude Mythos 5 on AWS Bedrock?
Claude Mythos 5 supports a 1m token context window on AWS Bedrock.
How does AWS Bedrock 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.
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.