Skip to content

model

Claude Fable 5

Anthropic model used as a comparison point in xAI's published benchmark tables for Grok 4.6.

Known aliases

  • Claude Fable
  • claude-fable-5
  • Claude Fable 5 (max with fallback)
  • Fable 5
  • Fable 5 Max

Relationships

No evidence-backed relationships are recorded.

Current stories

build1 publisher

Claude Fable 5.1 used an opponent's chess engine in 3 of 10 honeypot games

Claude Fable 5.1 took an opponent's chess engine in 3 of 10 honeypot games, the same week it solved a 1653 cipher in 44 minutes. Both runs argue for harnesses that enforce tool limits in the sandbox and grade the tool-call trace along with the result.

Publishers:dev.to

Reality

Evidence50
Adoption
Insufficient
Hype gap+20
Incentives
Insufficient
Confidence50
invest9 publishers

Anthropic's reported $11.6B quarter puts OpenAI's 18% on the defensive before either lists

Reported quarterly revenue of $11.6 billion against OpenAI's $6.7 billion resets the enterprise-AI question. The pricing and concentration data underneath it flatter neither company.

Perspective Coverage

9 publishers
Builder
Builder 13%
Operator
Operator 21%
Investor
Investor 66%

Reality

Evidence55
Adoption60
Hype gap+30
Incentives75
Confidence60
build5 publishers

Runway's Solaris turns every click into conditioning data for the next generated frame

Generating the interface as video instead of rendering it from code is a serious research bet. Runway's own preview still lists legible text and long-session coherence as open problems, which is roughly where ordinary interfaces begin.

Perspective Coverage

5 publishers
Builder
Builder 47%
Operator
Operator 37%
Investor
Investor 16%

Reality

Evidence45
Adoption5
Hype gap+35
Incentives65
Confidence60
leadership3 publishers

Anthropic moves misuse monitoring into cloud storage its customers control

The company argues that catching sophisticated misuse means correlating data across sessions and accounts, and regulated buyers balked at holding that data with a vendor, so the store moves to their cloud.

Perspective Coverage

3 publishers
Builder
Builder 23%
Operator
Operator 55%
Investor
Investor 22%

Reality

Evidence50
Adoption8
Hype gap+30
Incentives65
Confidence60
product8 publishers

OpenAI halves the API price of Sol and Luna against GPT-5.6's promotional rates

OpenAI says better caching and inference let it cut API prices for Sol and Luna by half, and the cost advantage it claims for the cheap tier over the old top tier comes in at one tenth on the benchmark it published and one hundredth in its summary.

Perspective Coverage

8 publishers
Builder
Builder 36%
Operator
Operator 42%
Investor
Investor 22%

Reality

Evidence40
Adoption
Insufficient
Hype gap+35
Incentives70
Confidence60
leadership3 publishers

A Friday letter from Commerce turned frontier-model routing into an export-control problem

Commerce told Anthropic on June 12 that any foreign national, anywhere, needs a BIS license to use Fable 5 or Mythos 5. Anthropic disabled both models for every customer to comply, and the letter has not been made public.

Publishers:anthropic.comcsis.orgnatlawreview.com

Perspective Coverage

3 publishers
Builder
Builder 32%
Operator
Operator 41%
Investor
Investor 27%

Reality

Evidence61
Adoption77
Hype gap+9
Incentives74
Confidence66
product1 publisher

OpenAI cuts prices on new GPT-6 Sol and Luna models

Sol now bills $2 and $10 per million tokens and Luna $0.10 and $0.50, while OpenAI quotes its own benchmark results per task, where the cheap model lands 2.2 points behind Sol on the software engineering test.

Publishers:thenextweb.com

Reality

Evidence42
Adoption55
Hype gap+25
Incentives78
Confidence52

Earlier coverage

  1. Anthropic documents five possible bioweapons cases it cannot confirm were meant to cause harm

    Product · September 11, 2026 · 7 publishers

  2. Re-running five Terminal-Bench-Science tasks at $12 each leaves Fable 5.1 passing one

    Build · September 10, 2026 · 1 publisher

  3. Anthropic's Fable 5 answers the old thinking toggle with an HTTP 400

    Build · September 8, 2026 · 1 publisher

  4. A 33-run sweep prices OpenAI's reasoning_effort ladder at 2.3x for identical answers

    Build · September 7, 2026 · 1 publisher

  5. Fable 5.1 doubles science benchmark score, cuts bug-hunt task time by 3.6 seconds

    Build · September 5, 2026 · 1 publisher

  6. Anthropic's 24 August incident took claude.ai, the API, Claude Code and Cowork down together

    Build · September 4, 2026 · 1 publisher

  7. Token efficiency absorbs GPT-6 Astra's 2.5x price increase inside the coding harness

    Science · September 4, 2026 · 1 publisher

  8. Anthropic's 25% cheaper Fable 5.1 discounts one of six lines on the price sheet

    Product · September 3, 2026 · 1 publisher

  9. Gemini 3.8 Flash buys three index points for a 45% rise in cost per task

    Leadership · September 3, 2026 · 1 publisher

  10. Anthropic launches Fable 5.1 and Mythos 5.1 with big benchmark gains, a day after $35B Lambda infrastructure deal

    Product · September 2, 2026 · 1 publisher

  11. Anthropic bills Pro seats extra for the flagship model already in their picker

    Product · September 2, 2026 · 1 publisher

  12. Fable 5.1's 52.6% science score arrives on a benchmark that was five days old

    Build · September 1, 2026 · 1 publisher

  13. A Commerce Department directive kept two Claude models dark worldwide for 18 days, though restoration was uneven

    Build · September 1, 2026 · 1 publisher

  14. Ramp's July card data puts Opus 4.8 at 3.5 times Claude Fable's spend share

    Product · August 30, 2026 · 1 publisher

  15. Open weights take 29% of gateway tokens on a twenty-fifth of the dollars

    Invest · August 30, 2026 · 1 publisher

  16. CoArena licenses the preference labels its free leaderboard generates

    Build · August 29, 2026 · 1 publisher

  17. Anthropic ships a price dial with its new model, and that is now the buying decision

    Leadership · August 26, 2026 · 1 publisher

  18. The EU AI Office can now fine and recall. The evidence has to come from somewhere

    Science · August 25, 2026 · 1 publisher

  19. App factory or agent fleet manager: the fork is whose rate limit stops the work

    Build · August 24, 2026 · 1 publisher

  20. Paying two AI vendors is the leverage. Write it into the contract before it expires

    Leadership · August 24, 2026 · 1 publisher

  21. Four Claude models, four surfaces, one incident: tier fallback is inside the blast radius

    Product · August 24, 2026 · 1 publisher

  22. Anthropic cut 80% of Claude Code's system prompt and the evals did not move

    Invest · August 23, 2026 · 1 publisher

  23. Nearly nine tenths of Anthropic spend is not on its best model, weeks before a $2T listing

    Invest · August 23, 2026 · 2 publishers

  24. Fable 5 at $50 per million output tokens turns model routing into a budget line

    Build · August 23, 2026 · 2 publishers

  25. Frontier scores at $2/$6: Grok 4.6 ties GPT-5.6 on one evaluator's index for a fifth the output price

    Science · August 23, 2026 · 1 publisher

  26. Physics-only world models cannot predict people, and the fix costs six pipeline stages

    Build · August 22, 2026 · 1 publisher

  27. Base Compute hands kernel tuning to agents; the carryover claim is the unmeasured part

    Build · August 21, 2026 · 1 publisher

  28. Chinese models now carry 60% of OpenRouter traffic, and 58% of what US firms route

    Invest · August 21, 2026 · 1 publisher

  29. Anthropic's protein binders got tested by outside labs. The benchmark is still Anthropic's.

    Product · August 19, 2026 · 1 publisher

  30. The AI bill nobody reconciles: cost per finished task, not per million tokens

    Leadership · August 18, 2026 · 1 publisher

  31. Claude's system prompt grew ninefold in two years. Version yours like code.

    Build · August 16, 2026 · 1 publisher

  32. Gemini 3.7 Flash Is Cheap Until January 1, When The Agent Bill Doubles

    Invest · August 16, 2026 · 2 publishers

  33. GLM-5.3 says the quiet part: the base model did not change, the post-training did

    Science · August 16, 2026 · 1 publisher

  34. Claude Code's new default is a confession: the approval prompt was never a control

    Build · August 16, 2026 · 1 publisher

  35. Developer habit, priced at $965B: what Anthropic's run actually proves

    Build · August 15, 2026 · 1 publisher

  36. Open weights caught up on finding bugs. They did not catch up on using them.

    Build · August 15, 2026 · 1 publisher

  37. PerceptionBench puts a number on the step your pipeline treats as free

    Build · August 14, 2026 · 1 publisher

  38. Three frontier launches in a day, all pitched on price. Open weights set the ceiling.

    Build · August 14, 2026 · 4 publishers

  39. GLM-5.3 Buys Buyers Time: Z.ai's Coding Model Cuts Tokens, Not the Closed-Model Lead

    Invest · August 14, 2026 · 1 publisher

  40. OpenAI puts latency on the price list: 750 tokens/sec, gated by workload fit

    Build · August 14, 2026 · 3 publishers