Still active, marked legacy. Same price as 5.1, so there's no reason to pin to it unless something in your prompts regressed.
Status
released
Released
9 June 2026
Context
1M tokens
Price / 1M
$10.00 in, $50.00 out
Mentions
8
Threads
1
What is Claude Fable 5?
Claude Fable 5 is a model from Anthropic, built in the US. It's out, and you can call it today.
When did Claude Fable 5 come out?
Anthropic released it on 9 June 2026. That date comes from the lab's own docs.
The tracker first logged the name on 9 June 2026 and last saw it on 1 September 2026.
What does it cost, and how much context does it hold?
Lab
Anthropic
Built in
US
Status
released
API model id
claude-fable-5
Released
9 June 2026
Context window
1M tokens
Max output
128K tokens
Input, per 1M tokens
$10.00
Output, per 1M tokens
$50.00
List prices per million tokens, read off the lab's own docs. Caching, batching and volume deals all cut the real number, so treat this as the ceiling. Check the source before you budget against it.
A dash means the lab hasn't published that number for that model.
What are people discussing about Claude Fable 5?
We tracked 1 public discussion naming Claude Fable 5 across r/ClaudeAI on 7 August 2026.
The subject that came up most was agents and tool use and what it costs. A discussion can cover several, so these add up to more than 1.
What people are discussing
Threads
agents and tool use
1
what it costs
1
Every mention we've logged
Every tracked post, release, changelog entry or incident whose title or summary names Claude Fable 5. Newest first, each one linking to where the lab published it.
What's changed
Added Claude Fable 5.1 ( claude-fable-5-1 ), now the default Fable model — 1M context, $10/$50 per Mtok with $0.25/Mtok cache reads
Added "Time format" ( timeFormat ) and timeZone settings: 12-hour, 24-hour, 24-hour UTC, or a strftime pattern for the turn-end clock and transcript-view timestamps
Added a Containment Escape rule to auto mode so cloud metadata-credential fetches, egress evasion, and cross-tenant reach are no longer auto-approved unless your environment marks them expected
Added CLAUDE_CODE_SUBAGENT_MODEL_FORCE to apply CLAUDE_CODE_SUBAGENT_MODEL (or the main…
Added Claude Fable 5.1 (claude-fable-5-1), now the default Fable model — 1M context, $10/$50 per Mtok with $0.25/Mtok cache reads
Added "Time format" (timeFormat) and timeZone settings: 12-hour, 24-hour, 24-hour UTC, or a strftime pattern for the turn-end clock and transcript-view timestamps
Added a Containment Escape rule to auto mode so cloud metadata-credential fetches, egress evasion, and cross-tenant reach are no longer auto-approved unless your environment marks them expected
Added CLAUDE_CODE_SUBAGENT_MODEL_FORCE to apply CLAUDE_CODE_SUBAGENT_MODEL (or the main model) to every…
Aug 18 , 19:01 UTC
Resolved - The issue affecting Claude Opus 5 has been resolved. Impact occurred from 16:11 to 18:23 UTC.
Aug 18 , 18:26 UTC
Monitoring - A fix has been implemented and we are monitoring the results.
Aug 18 , 17:12 UTC
Update - We are investigating elevated errors on requests to Claude Opus 5. We will provide an update as soon as possible.
Aug 18 , 16:20 UTC
Update - We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, Claude Opus 5, Claude Sonnet 5, Claude Haiku 4.5, and other Claude models. We will provide an update as soon as possible.
Aug…
Aug 15 , 00:27 UTC
Resolved - The issue affecting Claude services has been resolved. Impact occurred from 20:00 Aug 14, 2026 to 00:11 Aug 15 , 2026 UTC.
Aug 15 , 00:21 UTC
Update - We have identified the cause of the issue affecting Claude services and are working on a fix. We will provide an update as soon as possible.
Aug 15 , 00:20 UTC
Update - We have identified the cause of the issue affecting claude.ai and are working on a fix. We will provide an update as soon as possible.
Aug 14 , 23:57 UTC
Identified - We have identified the cause of elevated errors on requests to Claude Fable 5 and…
Aug 13 , 16:08 UTC
Resolved - The issue affecting Claude Mythos 5 and Claude Fable 5 has been resolved.
Aug 13 , 15:44 UTC
Update - We are investigating elevated errors on requests to Claude Mythos 5 and Claude Fable 5. We will provide an update as soon as possible.
Aug 13 , 14:33 UTC
Investigating - We are investigating elevated errors on requests to Claude Mythos 5, Claude Fable 5, and Claude Sonnet 5. We will provide an update as soon as possible.
Aug 12 , 18:07 UTC
Resolved - This issue has been resolved.
Aug 12 , 17:28 UTC
Update - We are continuing to work to resolve an issue resulting in slightly elevated errors on requests to Claude Fable 5. We will provide an update as soon as possible.
Aug 12 , 16:10 UTC
Identified - We have identified an issue which resulted in errors across multiple models. At this time, errors are primarily impacting Claude Fable 5 and we are working to fully resolve these issues.
Aug 12 , 13:50 UTC
Investigating - We are investigating elevated errors on requests to multiple models. We will provide an update…
We’re making updates to Claude Fable 5’s biology safeguards in a way that substantially reduces false positives. Fable 5 users will now experience many fewer “fallbacks”—where the system switches to a less capable model after they make a biology-related query.
Our next generation of intelligence for the hardest knowledge work and coding problems.
Keep reading
The release timeline is every model we know about, filterable by lab, country and date. The tracker is the live feed these mentions come from, and Model Watch is the whole catalogue on one page.