Migrating from claude-fable-5 to claude-fable-5-1
What changes when you move from claude-fable-5 to claude-fable-5-1: input price 0%, output price 0%.
- From
- claude-fable-5
- Status
- Active
- Shutdown
- not before Jun 9, 2027
- Time left
- —
- Status
- Active
- Shutdown
- not before Sep 1, 2027
- Time left
- —
Prices
USD per 1M tokens, standard tier| Type | claude-fable-5 | claude-fable-5-1 | Change |
|---|---|---|---|
| Input | $10.00first seen October 1, 2026 · source | $10.00first seen October 1, 2026 · source | 0% |
| Cached input | $1.00first seen October 1, 2026 · source | $0.25first seen October 1, 2026 · source | −75% |
| Output | $50.00first seen October 1, 2026 · source | $50.00first seen October 1, 2026 · source | 0% |
At 1M input and 250K output tokens a month: $22.50 on claude-fable-5, $22.50 on claude-fable-5-1 (0%).
Other tiers, prompt-size bands and modalities are on each model's page.
Limits
Tokens| Limit | claude-fable-5 | claude-fable-5-1 | Change |
|---|---|---|---|
| Context window | 1,000,000 tokensin place when tracking began (October 6, 2026) · source | 1,000,000 tokensin place when tracking began (October 6, 2026) · source | 0% |
| Max output tokens | 128,000 tokensin place when tracking began (October 6, 2026) · source | 128,000 tokensin place when tracking began (October 6, 2026) · source | 0% |
Benchmarks
Same benchmark and source on both sides; settings named where they differ| Benchmark | claude-fable-5 | claude-fable-5-1 | Change |
|---|---|---|---|
| Arena TextArena, max effort (vs high effort). | 1503 ±4 | 1501 ±6 | −2 within range |
| Arena Text: CodingArena, max effort (vs high effort). | 1551 ±7 | 1535 ±12 | −16 within range |
| Arena WebDevArena, max effort (vs high effort). Ranges don't overlap. | 1624 ±6 | 1743 ±9 | +119 |
| Arena VisionArena, max effort (vs high effort). Ranges don't overlap. | 1308 ±7 | 1286 ±10 | −22 |
| Arena SearchArena, high effort. | 1229 ±7 | 1233 ±7 | +4 within range |
| Arena DocumentArena, max effort (vs no setting). | 1499 ±8 | 1493 ±15 | −6 within range |
| Arena AgentArena, max effort (vs high effort). Ranges don't overlap. | 0.084 ±0.014 | 0.141 ±0.020 | +0.057 |
| FrontierMath Tier 4Epoch AI, max effort. | 90.2% | 87.8% | −2.4 pts |
| FrontierMath Tiers 1-3Epoch AI, max effort. | 87.0% | 90.2% | +3.2 pts |
| OTIS Mock AIME 2024-2025Epoch AI, max effort. | 99.7% | 100.0% | +0.3 pts |
| SimpleQA VerifiedEpoch AI, max effort (vs xhigh effort). | 70.7% | 70.8% | +0.1 pts |
A score from one source is never compared with another source's, and company-reported scores are compared only within the same company; settings named where they differ. Data: Arena (arena.ai), CC BY 4.0; Epoch AI, Capabilities & benchmarking (epoch.ai/benchmarks), CC BY.
Features and parameters
Compare modelsSame on both
- Prompt caching: supported on both.claude-fable-5: in place when tracking began (October 6, 2026) · source · claude-fable-5-1: in place when tracking began (October 6, 2026) · source
- Batch API: supported on both.claude-fable-5: in place when tracking began (October 6, 2026) · source · claude-fable-5-1: in place when tracking began (October 6, 2026) · source
- Image input: supported on both.claude-fable-5: in place when tracking began (October 6, 2026) · source · claude-fable-5-1: in place when tracking began (October 6, 2026) · source
- Reasoning / thinking: supported (thinking: adaptive, always on; default effort: high) on both.claude-fable-5: in place when tracking began (October 6, 2026) · source · claude-fable-5-1: in place when tracking began (October 6, 2026) · source
Not published for claude-fable-5: Structured outputs, Function calling, PDF input, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs.
Not published for claude-fable-5-1: Structured outputs, Function calling, PDF input, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs.
Aliases
All aliasesNo aliases point at either model.
On cloud platforms
All platform dates| Model | Platform | Platform ID | Shutdown | Time left |
|---|---|---|---|---|
| claude-fable-5 | Amazon Bedrock | anthropic.claude-fable-5 | not before Jun 9, 2027Active | |
| claude-fable-5 | Microsoft Foundryversion 1 | claude-fable-5 | Dec 5, 2027Active | 416 days |
| claude-fable-5-1 | Amazon Bedrock | anthropic.claude-fable-5-1 | not before Sep 1, 2027Active | |
| claude-fable-5-1 | Microsoft Foundryversion 1 | claude-fable-5-1 | Dec 5, 2027Active | 416 days |
Read daily from each platform's own pages. The status above uses each company's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.
Checklist
- Change the model string from
claude-fable-5toclaude-fable-5-1.
Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: claude-fable-5, claude-fable-5-1.