Claude Fable 5.2 vs GPT-6 Astra

Change models
Claude Fable 5.2AnthropicSmartest
IndexAll categories, out of 100.
85.6 ±3.7 best
78.0 ±1.9
GapIndex points below the top.
Top
−7.6
CoverageIndex weight that has results.
90%
100% best
SpeedOutput tokens per second.
64/s best
34/s
EloLMArena rating and rank.
—
1440
ReleasedMonth of release.
2026-11
2026-09
Input / 1MUS dollars per 1M input tokens.
$8.00 best
$10.00
Output / 1MUS dollars per 1M output tokens.
$40.00 best
$50.00
Batch output / 1MBatch price per 1M output tokens.
$20.00 best
$25.00
1K chats2K tokens in, 500 out, each.
$36.00 best
$45.00
1K documents20K tokens in, 1K out, each.
$200.00 best
$250.00
1K agent tasks200K tokens in, 20K out, each.
$2,400.00 best
$3,000.00
ContextMaximum tokens in one request.
1M
1.05M best
AgenticMulti-step tasks with tools.
82.2 best
74.6
CodingCode writing and repair.
86.2 best
76.9
ReasoningLogic problems and puzzles.
86.5 best
83.8
MultimodalTasks with images and text.
82.0 best
71.2
KnowledgeFacts and expert knowledge.
87.1 best
78.5
MultilingualTasks in many languages.
—
73.6
InstructionTasks with strict prompt rules.
—
79.5
MathMath problems.
79.3 best
78.0

Benchmarks

54 shared
Only Claude Fable 5.2: 17Only GPT-6 Astra: 84
Claude Fable 5.2
GPT-6 Astra
74.3% best1 / 222
54.7%8 / 222
83.3% best13 / 217
80.7%37 / 217
93.9%14 / 217
95.8% best3 / 217
35.4% best1 / 214
31.7%4 / 214
99.7%14 / 200
100.0% best1 / 200
79.1% best1 / 164
61.6%6 / 164
92.5%3 / 131
95.0% best1 / 131
97.5%5 / 126
97.5%5 / 126
93.8% best1 / 123
89.6%8 / 123
98.8% best1 / 122
97.5%5 / 122
99.0% best2 / 116
97.8%14 / 116
67.7% best1 / 114
56.5%24 / 114
94.0% best1 / 91
75.6%4 / 91
Chess PuzzlesReasoning
79.0% best1 / 90
74.0%3 / 90
95.1% best1 / 90
93.7%2 / 90
46.2% best19 / 90
39.4%37 / 90
32.1% best23 / 82
20.7%52 / 82
90.0% best1 / 80
84.0%2 / 80
100.0% best1 / 72
97.6%3 / 72
19.0% best1 / 65
5.5%5 / 65