DeepSWE
No official DeepSWE mini-swe-agent row for this identity on the public board we fetched.
claude-fable-5-1The dateless API id and pinned snapshot are both claude-fable-5-1. Continuum uses the bare id at the gateway and continuum/claude-fable-5-1 in cross-provider pickers.
Adaptive thinking is always on. Supported effort levels are low, medium, high, xhigh, and max; high is the default. The input context is 1,000,000 tokens, maximum output is 128,000 tokens, and the knowledge cutoff is June 2026.
Anthropic positions it for demanding reasoning and long-horizon agentic work. Continuum gives both rails the same auto-routing scores while delisting Fable 5 from new work.
Use Fable 5.1 for the hardest long-running coding work, architecture decisions, and investigations where coherence and taste matter more than unit cost.
Choose it instead of Fable 5 for every new session. The old id remains only so historic analytics and already-running hosted work continue to price correctly.
No independent board lists this exact SKU as of 2026-08-19.
Closest benchmarked sibling: Claude Opus 5, 74% ±4% Pass@1 at max on the DeepSWE official board. That is a score for the sibling, not for this SKU.
Boards checked: DeepSWE official (2026-08-13), Artificial Analysis Intelligence Index, vals.ai hero index. Every card that does carry a row is on the coding leaderboard.
No official DeepSWE mini-swe-agent row for this identity on the public board we fetched.
No Intelligence Index integer fetched for this identity. Chip omitted.
We did not open a vals.ai card for this identity. Chip omitted.
Get Plus to use the Continuum-hosted Fable 5.1 rail. Not a Mac download.
Anthropic does not publish Fable 5.1 weights. There is no official Hugging Face repo and no Files button on this page. Get Plus buys hosted inference, not a local checkpoint.
tool_choice values are unsupported. Automatic tool selection remains available.Lab card and OpenRouter listing only. No Hugging Face Files button, because there is no official repo to point at.
Fetched OpenRouter catalog on 2026-08-19. hugging_face_id was empty.
Continuum hosts the bare gateway id claude-fable-5-1. Native Claude sessions use the same bare id on the user’s Anthropic subscription.
The previous claude-fable-5 row is absent from new-session menus. Its pricing and hosted capability metadata remain for history and in-flight sessions.
claude-fable-5-1
click to select
We list first-party and OpenRouter, plus Continuum only when the live public allowlist named the id. This is not a 15-host routing table.
Official pricing per million tokens: $10 input, $50 output, $0.25 cache read, $12.50 five-minute cache write, and $20 one-hour cache write.
The cache-read price is one quarter of Fable 5’s $1 per million rate. Continuum’s gateway uses an exact 5.1 rate key so the older family prefix cannot overcharge cache hits.
On a Claude plan? The plan picker models the weekly caps.
| Claim | Source | As of |
|---|---|---|
| API id, pricing, context, output ceiling, adaptive thinking, effort levels, forced-tool behavior | Anthropic Fable 5.1 overview | 2026-09-01 |
| No base OpenRouter slug on the 2026-08-19 catalog; Hugging Face unlisted | OpenRouter /api/v1/models | 2026-08-19 |
Same official DeepSWE harness (mini-swe-agent, public 113 tasks), fetched 2026-08-19. Different effort labels are the lab's own setting on that board, shown here rather than normalized.
Continue through Anthropic's model family with Claude Opus 5.5.
Yes for new sessions. Continuum delists Fable 5 from pickers but retains its rate and capability rows so historic usage and in-flight hosted sessions remain correct.
No. Forced tool choice is a breaking change from Fable 5. Leave selection on automatic. Continuum clamps forced choices before forwarding the request.
Lab posts pick a harness, an effort, a split, and sometimes a private eval set. DeepSWE publishes the official mini-swe-agent row with cost, tokens, and steps. Scale SWE-bench Pro only counts when the public shared-harness board has a row we can fetch. A higher lab number is usually a different test, not a better one.
Verified against the live public allowlist on 2026-08-19. Base URL is https://continuumcode.ai/v1. Keys are cont_sk_ from Settings, Account, Inference API. Personal keys need Plus or above.
curl https://continuumcode.ai/v1/chat/completions \
-H "Authorization: Bearer $CONTINUUM_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"claude-fable-5-1","messages":[{"role":"user","content":"Review this diff."}]}'