Fable 5.5: Release Date and What's Actually Confirmed
Anthropic has not confirmed a public Fable 5.5 release date, price or API model ID. The current Fable model is Fable 5.1 (claude-fable-5-1). This page tracks the official record, separates it from speculation, and shows what to use in the meantime.
Fable 5.5 status at a glance
| Question | What official sources establish (Oct 3, 2026) |
|---|---|
| Has Fable 5.5 launched? | Not confirmed |
| Confirmed release date or window? | None found |
| Published API model ID? | None — do not invent claude-fable-5-5 |
| Price / context / benchmarks? | No verified figures |
| Current documented Fable model | Fable 5.1, ID claude-fable-5-1 |
Dated finding based on Anthropic's public news, model directory, API release notes and pricing. It does not prove a future model will never ship, and it does not rule out an unreleased internal preview.
👉 Continuously updated deep dive: Fable 5.5 — release status, evidence and what to watch.
Why Opus 5.5 and Sonnet 5.5 don't confirm a Fable 5.5 date
Claude's 2026 releases have arrived on independent schedules. Claude's API release notes record three separate launches:
- September 1, 2026 — Claude Fable 5.1 (
claude-fable-5-1) - September 22, 2026 — Claude Opus 5.5
- September 28, 2026 — Claude Sonnet 5.5
Those are three distinct models. None is a shared "5.5" launch schedule, and nothing official says Fable is next or must follow a fixed delay. A screenshot, a third-party listing or an "early next" rumor is a lead to verify, not a release date.
What to use right now
Fable 5.1 is Anthropic's current Fable model: 1M-token context, up to 128K output, adaptive thinking (always on), and a June 2026 knowledge cutoff. It keeps Fable 5's input/output and cache-write rates and cuts the cache-read rate to $0.25 per million tokens.
| Model | Released | Input / Output (per 1M) | Best for |
|---|---|---|---|
| Fable 5.1 | Sep 1, 2026 | $10 / $50 | Hardest long-horizon agents, huge cached context |
| Opus 5.5 | Sep 22, 2026 | $4 / $20 | Most workloads — Anthropic's default recommendation |
| Sonnet 5.5 | Sep 28, 2026 | $2 / $10 | High-volume, cost-sensitive coding and chat |
Anthropic standard list prices, USD per million tokens. Cache read is $0.25/MTok on Fable 5.1 and $0.20/MTok on Opus 5.5 and Sonnet 5.5. Cache writes, tools, taxes and regional routing are separate.
Rule of thumb: start with Opus 5.5, move to Fable 5.1 only when a serious Opus attempt at higher effort still fails your acceptance test. Full Fable 5.1 vs Opus 5.5 vs Sonnet 5.5 comparison →
How to use Fable today
Two practical routes while Fable 5.5 is unannounced:
- Official: Claude API, AWS Bedrock, Vertex AI and Microsoft Foundry expose
claude-fable-5-1; claude.ai and Claude Code meter Fable usage against paid usage credits. - Aggregator: OmniaKey lists
claude-fable-5-1at $2.80 input / $14.00 output per million tokens (72% below Anthropic list), with an official-compatible endpoint, no card required to sign up, and USDT or card top-up.
Developer quickstart and model-ID details: fableapi.app. Claude ecosystem how-tos: fableclaude.com.
Verify any model ID on the provider you actually deploy with — this page is informational and is not affiliated with Anthropic.
Don't wait on an unconfirmed version number
OmniaKey: Fable 5.1 at $2.80/$14 per million (72% off list) · no card required · USDT or card · balance never expires
Fable 5.5 FAQ
Is Fable 5.5 out?
No public release is confirmed as of October 3, 2026. Anthropic's model directory still lists Fable 5.1 as the current Fable model.
When will Fable 5.5 be released?
No official date or window has been announced. Treat any specific countdown as unverified until Anthropic publishes an announcement and API documentation.
What is the current Fable model and API ID?
Fable 5.1, model ID claude-fable-5-1. Do not derive claude-fable-5-5 from it — use an ID only after the provider documents it.
How much does Fable cost now?
Anthropic lists Fable 5.1 at $10 input / $50 output and $0.25 cache read per million tokens. OmniaKey currently lists $2.80 / $14.00 / $0.07.
Should I wait for Fable 5.5 instead of building now?
Build now if a documented model meets your requirements. Keep the model configurable and revisit only when an official announcement, a documented API contract and your account access all line up.