Best for agents

Ranked by APEX-Agents - long-horizon professional tasks performed by agents. Source: Epoch AI. Variants (reasoning effort, batch) are folded into one row.

#	Model	Capability	AA index	Reasoning	Math	Coding	Context	$/M	Weights	Released
1	AClaude Sonnet 5.5NEWAnthropic · +1 variant	—	56.0	—	—	—	1M	$4.00	—	28 Sep 2026
2	AClaude Opus 5.5NEWAnthropic	—	57.6	—	—	—	1M	$8.00	—	22 Sep 2026
3	AClaude Fable 5.1NEWunknownAnthropic · +1 variant	—	—	—	—	—	—	—	Closed	1 Sep 2026
4	OGPT-6 AstraNEWunknown thinkingOpenAI	—	—	—	—	—	—	—	Closed	3 Sep 2026
5	GGemini 3.8 FlashNEWunknownGoogle	—	—	—	—	—	—	—	Closed	2 Sep 2026
6	MMuse Spark 1.3NEWunknownMeta	—	—	—	—	—	—	—	Closed	2 Sep 2026
7	OGPT-6 SolNEWOpenAI	—	47.5	—	—	—	1.05M	$4.00	—	22 Sep 2026
8	OGPT-6 LunaNEWOpenAI	—	37.3	—	—	—	1.05M	$0.20	—	22 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.