Best for math

Ranked by Epoch's mock AIME 2024-2025 (competition mathematics). Source: Epoch AI. Variants (reasoning effort, batch) are folded into one row.

#	Model	Capability	AA index	Reasoning	Math	Coding	Context	$/M	Weights	Released
1	OGPT-6 AstraNEWOpenAI	166.6	52.7	95.8	100.0	73.2	1.05M	$20.00	Closed	3 Sep 2026
2	AClaude Fable 5.1NEWAnthropic	165.0	53.4	—	100.0	—	1M	$20.00	Closed	1 Sep 2026
3	AQwen3.8 Max (0902)NEWxhighAlibaba (Qwen)	—	—	92.3	100.0	—	—	—	Closed	1 Sep 2026
4	MMuse Spark 1.3NEWxhighMeta	—	—	—	99.2	—	—	—	Closed	2 Sep 2026
5	GGemini 3.8 FlashNEWGoogle	157.1	40.9	95.4	98.9	73.8	1.05M	$1.50	Closed	2 Sep 2026

• AClaude Sonnet 5.5
  Anthropic · 28 Sep 2026 · AA 56 · 1M · $4.00/M
• AQwen3.8 Max Prime
  Alibaba (Qwen) · 23 Sep 2026 · 1M · $6.00/M
• OGPT-6 Sol
  OpenAI · 22 Sep 2026 · AA 47.5 · 1.05M · $4.00/M
• OGPT-6 Luna
  OpenAI · 22 Sep 2026 · AA 37.3 · 1.05M · $0.20/M
• OGPT-6 Sol Pro
  OpenAI · 22 Sep 2026 · 1.05M · $4.00/M
• OGPT-6 Luna Pro
  OpenAI · 22 Sep 2026 · 1.05M · $0.20/M
• AClaude Opus 5.5
  Anthropic · 22 Sep 2026 · AA 57.6 · 1M · $8.00/M
• XGrok 4.7
  xAI · 21 Sep 2026 · AA 46.4 · 500K · $3.00/M

Not ranked until an independent evaluator (Epoch AI) publishes scores. We don't use vendor-reported benchmark claims for rankings.