Claude Fable 5

Anthropic · released Jun 8, 2026

Anthropic flagship with adaptive reasoning and Opus-class fallback, tuned for the hardest open-ended and agentic tasks.

textimage1.0M ctxNot disclosed

93.4

Podium Score

#2 of 673

1509

Arena Elo

1 on Arena

71 t/s

Output Speed

$50/M

Output Price

$10/M in

1.0M

Context Window

Scores by Source

#1 · 17.8k votes · ±6

Artificial Analysis ↗

Intelligence Index

Composite score

Category Scores

📜 Long Context

99.2

96.2

84.1

81.0

71.4

62.1

43.3

10.2

Benchmark Results

τ²-Bench Retail

98.5%

SWE-Bench Verified

95%

92.6%

70%

Ifbench

63.5%

Terminal-Bench Hard

62.9%

60.2%

Humanity’s Last Exam

53.3%

Model Details

Release date	Jun 8, 2026
Parameters	Not disclosed
License	Proprietary
Context Window	1,000,000 tokens
Input Price	$10/M
Output Price	$50/M
Output Speed	71 t/s
Time to First Token	141 ms

Head-to-head

vs Claude Mythos Preview vs Kimi K3 vs Claude Opus 5 vs GPT-5.6 Sol vs Qwen3.8 Max vs Claude Opus 4.8