Longest context

Ranked by maximum context window (tokens) as listed by the API provider. Source: OpenRouter. Variants (reasoning effort, batch) are folded into one row.

#	Model	Capability	AA index	Reasoning	Math	Coding	Context	$/M	Weights	Released
1	OGPT-6 AstraNEWbatchOpenAI · +1 variant	—	52.7	—	—	—	1.05M	$10.00	—	4 Sep 2026
2	OGPT-6 Astra ProNEWOpenAI · +1 variant	—	—	—	—	—	1.05M	$20.00	—	4 Sep 2026
3	OGPT-6 LunaNEWOpenAI · +1 variant	—	37.3	—	—	—	1.05M	$0.20	—	22 Sep 2026
4	OGPT-6 Luna ProNEWOpenAI · +1 variant	—	—	—	—	—	1.05M	$0.20	—	22 Sep 2026
5	OGPT-6 SolNEWOpenAI · +1 variant	—	47.5	—	—	—	1.05M	$4.00	—	22 Sep 2026
6	OGPT-6 Sol ProNEWOpenAI · +1 variant	—	—	—	—	—	1.05M	$4.00	—	22 Sep 2026
7	XMiMo-V2.6-ProNEWXiaomi	—	46.3	—	—	—	1.05M	$0.54	Open	21 Sep 2026
8	GGemini 3.8 FlashNEWGoogle · +1 variant	157.1	40.9	95.4	98.9	73.8	1.05M	$1.50	Closed	2 Sep 2026
9	MMuse Spark 1.3NEWMeta	156.9	—	—	—	—	1.05M	$2.00	Closed	2 Sep 2026
10	DDeepSeek V4.1 FlashNEWbatchDeepSeek · +1 variant	—	39.5	—	—	—	1.05M	$0.17	Open	10 Sep 2026
11	FEmber-1NEWFireworks AI	—	—	—	—	—	1.05M	$6.00	—	24 Sep 2026
12	ZGLM 5.3 FlashXNEWZ.ai (Zhipu AI)	—	—	—	—	—	1.05M	$0.59	—	18 Sep 2026
13	XMiMo-V2.6-FlashNEWXiaomi	—	37.9	—	—	—	1.05M	$0.17	Open	21 Sep 2026
14	XMiMo-V2.6-Pro-UltraSpeedNEWXiaomi	—	—	—	—	—	1.05M	$5.44	—	21 Sep 2026
15	MMuse Spark 1.3 ContributorNEWMeta	—	—	—	—	—	1.05M	$0.13	—	2 Sep 2026
16	AClaude Fable 5.1NEWAnthropic · +1 variant	165.0	53.4	—	100.0	—	1M	$20.00	Closed	1 Sep 2026
17	AQwen3.8 Max (0902)NEWAlibaba (Qwen)	155.3	45.4	—	—	—	1M	$3.00	Closed	1 Sep 2026
18	AClaude Opus 5.5NEWAnthropic · +1 variant	—	57.6	—	—	—	1M	$8.00	—	22 Sep 2026
19	AClaude Sonnet 5.5NEWAnthropic · +1 variant	—	56.0	—	—	—	1M	$4.00	—	28 Sep 2026
20	SFugu MaxNEWSakana AI	—	—	—	—	—	1M	$3.00	—	11 Sep 2026
21	SFugu Ultra v2NEWSakana AI	—	—	—	—	—	1M	$11.25	—	11 Sep 2026
22	ZGLM 5.3 PrimeNEWZ.ai (Zhipu AI)	—	—	—	—	—	1M	$4.30	—	23 Sep 2026
23	TJev RouterNEWTypeSafe	—	—	—	—	—	1M	—	—	25 Sep 2026
24	AQwen3.8 Max PrimeNEWAlibaba (Qwen)	—	—	—	—	—	1M	$6.00	—	23 Sep 2026
25	AQwen3.8 Omni FlashNEWAlibaba (Qwen)	—	—	—	—	—	1M	$0.23	—	21 Sep 2026
26	USolar Mini 4NEWUpstage	—	—	—	—	—	524K	$0.087	—	23 Sep 2026
27	XGrok 4.7NEWxAI	—	46.4	—	—	—	500K	$3.00	—	21 Sep 2026
28	AAion 3.5NEWAionLabs	—	—	—	—	—	262K	$3.75	—	23 Sep 2026
29	AAion 3.5 MiniNEWAionLabs	—	—	—	—	—	262K	$0.88	—	23 Sep 2026
30	ILing 3.0 Flash VLNEWinclusionAI (Ant Group)	—	24.6	—	—	—	262K	$0.031	Open	10 Sep 2026
31	NNex-N2.5-MiniNEWNex AGI	—	—	—	—	—	262K	$0.044	Open	8 Sep 2026
32	NNex-N2.5-ProNEWNex AGI	—	—	—	—	—	262K	$0.12	Open	8 Sep 2026
33	UParetoNEWunbiased	—	—	—	—	—	262K	$3.75	—	17 Sep 2026
34	PTernary Bonsai 2 27BNEWPrismML	—	—	—	—	—	262K	$0.18	Open	18 Sep 2026
35	IMercury 2.5NEWInception Labs	—	12.3	—	—	—	260K	$0.068	—	8 Sep 2026
36	IGranite 4.2 8BNEWIBM	—	11.1	—	—	—	131K	$0.11	Open	31 Aug 2026
37	ISchematron V2 SmallNEWInference.net	—	—	—	—	—	128K	$0.095	Open	12 Sep 2026
38	ISchematron V2 TurboNEWInference.net	—	—	—	—	—	128K	$0.060	Open	12 Sep 2026
39	PPerceptron Mk1.5NEWPerceptron	—	—	—	—	—	37K	$0.49	—	25 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.