Claude Mythos Preview
Deprecated invitation-only research-preview model for Project Glasswing defensive-cybersecurity work; still reachable for invited customers (including on Amazon Bedrock) but migrate to Claude Mythos 5/5.1.
Data checked 2026-09-06
Anthropic
deprecated
claude-mythos-preview
- Context window
- 1M tokens in
- Max output
- —
- Input
- — per 1M tokens
- Output
- — per 1M tokens
- Licence
- proprietary
A What it is for
No price, context window or output limit is published on any official Anthropic page - all numeric fields are recorded as unknown rather than guessed. It runs no safety classifiers and rejects non-default temperature/top_p/top_k.
B Capabilities
| Input modalities | text, image |
|---|---|
| Output modalities | text |
C Others from Anthropic
| Model | Context | Max out | In $/M | Out $/M | Blended | Status |
|---|---|---|---|---|---|---|
Claude Fable 5.1
claude-fable-5-1
|
1M | 128K | $10.00 | $50.00 | $20.00 | ga |
Claude Mythos 5.1
claude-mythos-5-1
|
1M | 128K | $10.00 | $50.00 | $20.00 | preview |
Claude Fable 5
claude-fable-5
|
1M | 128K | $10.00 | $50.00 | $20.00 | ga |
Claude Mythos 5
claude-mythos-5
|
1M | 128K | $10.00 | $50.00 | $20.00 | preview |
Claude Opus 5
claude-opus-5
|
1M | 128K | $5.00 | $25.00 | $10.00 | ga |
Claude Opus 4.8
claude-opus-4-8
|
1M | 128K | $5.00 | $25.00 | $10.00 | ga |
Claude Opus 4.7
claude-opus-4-7
|
1M | 128K | $5.00 | $25.00 | $10.00 | ga |
Claude Opus 4.6
claude-opus-4-6
|
1M | 128K | $5.00 | $25.00 | $10.00 | ga |
Claude Opus 4.5
claude-opus-4-5-20251101
|
200K | 64K | $5.00 | $25.00 | $10.00 | ga |
Claude Sonnet 5
claude-sonnet-5
|
1M | 128K | $2.00 | $10.00 | $4.00 | ga |
Claude Sonnet 4.6
claude-sonnet-4-6
|
1M | 128K | $3.00 | $15.00 | $6.00 | ga |
Claude Sonnet 4.5
claude-sonnet-4-5-20250929
|
200K | 64K | $3.00 | $15.00 | $6.00 | ga |
D Verify before you commit
Model pricing changes without notice and this page is a snapshot. Confirm against the vendor's own page before you build a budget on it.
Source: platform.claude.com · checked 2026-09-06 · Anthropic pricing · API docs
Some figures on this page are recorded at low confidence — the vendor does not publish them in a single authoritative place. Treat them as indicative.