What's the cheapest long-context model on OpenKey?

DeepSeek V4 Flash, at $0.09/M input and $0.18/M output for 1,048,576 tokens of context. On OpenKey that's $0.0927/M input and $0.1854/M output after the flat 3% fee ($0.09 × 1.03, $0.18 × 1.03). It also carries a real benchmark result (design_arena SVG, rank 23).

Which model has the largest context window in this list?

Grok 4.20 and Grok 4.20 Multi-Agent both sit at 2,000,000 tokens, tied with the Pareto Code Router product. Among priced, benchmarked chat models, that's double the 1,000,000-token window most competitors ship.

Are there free long-context models?

Yes. Nemotron 3 Ultra (free) and Nemotron 3 Super (free) both offer 1,000,000-token context at $0/M for input and output — the paid versions carry the same specs and benchmark scores, so the free tier isn't a stripped-down variant here.

Long-context models

Models with a context window of 400K tokens or more. 87 of 338 catalog models match as of July 2026.

87
Models: $0.052
Input from /1M: 10M
Max context: Jun 30, 2026
Newest release

87 models in OpenKey's catalog now clear the 1M-token-context bar, and the newest, Claude Sonnet 5, landed 2026-06-30 with a 1,000,000-token window at $2/$10 per million (input/output). Pricing spans an enormous range depending on how you filter out the pay-as-you-go router products, but real-model input costs run from $0.09/M (DeepSeek V4 Flash) up to $30/M (GPT-5.5 Pro, Claude Opus 4.7 Fast). Several models now push past 1M tokens entirely — Grok 4.20 and Grok 4.20 Multi-Agent sit at 2,000,000, and Pareto Code Router claims 2,000,000 as well. If you're building something that ingests full codebases or long documents, this list is where to start.

Top picks

DeepSeek V4 Flash

Cheapest long-context model with a verified benchmark result in this set: $0.09/M input, $0.18/M output, 1,048,576 tokens of context, and a design_arena SVG rank of 23 (elo 1216). If you need scale on a budget, this is the floor.

Claude Opus 4.7

1,000,000-token context at $5/M input, $25/M output, and the top design_arena agenticgamedev rank (rank 1, elo 1289) in this list — the strongest benchmark-to-context combination among the fee-based models.

Grok 4.20

2,000,000-token context, double most competitors, at $1.25/M input and $2.5/M output — the largest window here at a mid-tier price, useful when you genuinely need more than 1M tokens of room.

All 87 models

Full catalog →

ModelContextInput /1MOutput /1M

Claude Sonnet 5Anthropic1M$2.00 + 3% $0.060 = $2.06$10.00 + 3% $0.300 = $10.30ctx 1M · in$2.00 + 3% $0.060 = $2.06out$10.00 + 3% $0.300 = $10.30
Fugu UltraSakana AI1M$5.00 + 3% $0.150 = $5.15$30.00 + 3% $0.900 = $30.90ctx 1M · in$5.00 + 3% $0.150 = $5.15out$30.00 + 3% $0.900 = $30.90
GLM 5.2Z.ai1.0M$0.930 + 3% $0.028 = $0.958$3.00 + 3% $0.090 = $3.09ctx 1.0M · in$0.930 + 3% $0.028 = $0.958out$3.00 + 3% $0.090 = $3.09
FusionOpenRouter1MVariableVariablectx 1M · inVariableoutVariable
Claude Fable 5Anthropic1M$10.00 + 3% $0.300 = $10.30$50.00 + 3% $1.50 = $51.50ctx 1M · in$10.00 + 3% $0.300 = $10.30out$50.00 + 3% $1.50 = $51.50
Nemotron 3 UltraNVIDIA1M$0.500 + 3% $0.015 = $0.515$2.20 + 3% $0.066 = $2.27ctx 1M · in$0.500 + 3% $0.015 = $0.515out$2.20 + 3% $0.066 = $2.27
Nemotron 3 Ultra (free)FreeNVIDIA1MFreeFreectx 1M · inFreeoutFree
Qwen3.7 PlusQwen1M$0.320 + 3% $0.0096 = $0.330$1.28 + 3% $0.038 = $1.32ctx 1M · in$0.320 + 3% $0.0096 = $0.330out$1.28 + 3% $0.038 = $1.32
MiniMax M3MiniMax1.0M$0.300 + 3% $0.0090 = $0.309$1.20 + 3% $0.036 = $1.24ctx 1.0M · in$0.300 + 3% $0.0090 = $0.309out$1.20 + 3% $0.036 = $1.24
Claude Opus 4.8Anthropic1M$5.00 + 3% $0.150 = $5.15$25.00 + 3% $0.750 = $25.75ctx 1M · in$5.00 + 3% $0.150 = $5.15out$25.00 + 3% $0.750 = $25.75
Claude Opus 4.8 (Fast)Anthropic1M$10.00 + 3% $0.300 = $10.30$50.00 + 3% $1.50 = $51.50ctx 1M · in$10.00 + 3% $0.300 = $10.30out$50.00 + 3% $1.50 = $51.50
Qwen3.7 MaxQwen1M$1.25 + 3% $0.037 = $1.29$3.75 + 3% $0.112 = $3.86ctx 1M · in$1.25 + 3% $0.037 = $1.29out$3.75 + 3% $0.112 = $3.86
Gemini 3.5 FlashGoogle1.0M$1.50 + 3% $0.045 = $1.54$9.00 + 3% $0.270 = $9.27ctx 1.0M · in$1.50 + 3% $0.045 = $1.54out$9.00 + 3% $0.270 = $9.27
Claude Opus 4.7 (Fast)Anthropic1M$30.00 + 3% $0.900 = $30.90$150.00 + 3% $4.50 = $154.50ctx 1M · in$30.00 + 3% $0.900 = $30.90out$150.00 + 3% $4.50 = $154.50
Gemini 3.1 Flash LiteGoogle1.0M$0.250 + 3% $0.0075 = $0.258$1.50 + 3% $0.045 = $1.54ctx 1.0M · in$0.250 + 3% $0.0075 = $0.258out$1.50 + 3% $0.045 = $1.54
GPT Chat LatestOpenAI400K$5.00 + 3% $0.150 = $5.15$30.00 + 3% $0.900 = $30.90ctx 400K · in$5.00 + 3% $0.150 = $5.15out$30.00 + 3% $0.900 = $30.90
Grok 4.3xAI1M$1.25 + 3% $0.037 = $1.29$2.50 + 3% $0.075 = $2.58ctx 1M · in$1.25 + 3% $0.037 = $1.29out$2.50 + 3% $0.075 = $2.58
Qwen3.5 Plus 2026-04-20Qwen1M$0.300 + 3% $0.0090 = $0.309$1.80 + 3% $0.054 = $1.85ctx 1M · in$0.300 + 3% $0.0090 = $0.309out$1.80 + 3% $0.054 = $1.85
Qwen3.6 FlashQwen1M$0.188 + 3% $0.0056 = $0.193$1.13 + 3% $0.034 = $1.16ctx 1M · in$0.188 + 3% $0.0056 = $0.193out$1.13 + 3% $0.034 = $1.16
DeepSeek V4 FlashDeepSeek1.0M$0.090 + 3% $0.0027 = $0.093$0.180 + 3% $0.0054 = $0.185ctx 1.0M · in$0.090 + 3% $0.0027 = $0.093out$0.180 + 3% $0.0054 = $0.185
DeepSeek V4 ProDeepSeek1.0M$0.435 + 3% $0.013 = $0.448$0.870 + 3% $0.026 = $0.896ctx 1.0M · in$0.435 + 3% $0.013 = $0.448out$0.870 + 3% $0.026 = $0.896
GPT-5.5OpenAI1.1M$5.00 + 3% $0.150 = $5.15$30.00 + 3% $0.900 = $30.90ctx 1.1M · in$5.00 + 3% $0.150 = $5.15out$30.00 + 3% $0.900 = $30.90
GPT-5.5 ProOpenAI1.1M$30.00 + 3% $0.900 = $30.90$180.00 + 3% $5.40 = $185.40ctx 1.1M · in$30.00 + 3% $0.900 = $30.90out$180.00 + 3% $5.40 = $185.40
MiMo-V2.5Xiaomi1.0M$0.105 + 3% $0.0031 = $0.108$0.280 + 3% $0.0084 = $0.288ctx 1.0M · in$0.105 + 3% $0.0031 = $0.108out$0.280 + 3% $0.0084 = $0.288
MiMo-V2.5-ProXiaomi1.0M$0.435 + 3% $0.013 = $0.448$0.870 + 3% $0.026 = $0.896ctx 1.0M · in$0.435 + 3% $0.013 = $0.448out$0.870 + 3% $0.026 = $0.896
Pareto Code RouterOpenRouter2MVariableVariablectx 2M · inVariableoutVariable
Claude Opus 4.7Anthropic1M$5.00 + 3% $0.150 = $5.15$25.00 + 3% $0.750 = $25.75ctx 1M · in$5.00 + 3% $0.150 = $5.15out$25.00 + 3% $0.750 = $25.75
Qwen3.6 PlusQwen1M$0.325 + 3% $0.0097 = $0.335$1.95 + 3% $0.058 = $2.01ctx 1M · in$0.325 + 3% $0.0097 = $0.335out$1.95 + 3% $0.058 = $2.01
Grok 4.20xAI2M$1.25 + 3% $0.037 = $1.29$2.50 + 3% $0.075 = $2.58ctx 2M · in$1.25 + 3% $0.037 = $1.29out$2.50 + 3% $0.075 = $2.58
Grok 4.20 Multi-AgentxAI2M$1.25 + 3% $0.037 = $1.29$2.50 + 3% $0.075 = $2.58ctx 2M · in$1.25 + 3% $0.037 = $1.29out$2.50 + 3% $0.075 = $2.58
Lyria 3 Clip PreviewFreeGoogle1.0MFreeFreectx 1.0M · inFreeoutFree
Lyria 3 Pro PreviewFreeGoogle1.0MFreeFreectx 1.0M · inFreeoutFree
GPT-5.4 MiniOpenAI400K$0.750 + 3% $0.022 = $0.772$4.50 + 3% $0.135 = $4.63ctx 400K · in$0.750 + 3% $0.022 = $0.772out$4.50 + 3% $0.135 = $4.63
GPT-5.4 NanoOpenAI400K$0.200 + 3% $0.0060 = $0.206$1.25 + 3% $0.037 = $1.29ctx 400K · in$0.200 + 3% $0.0060 = $0.206out$1.25 + 3% $0.037 = $1.29
Nemotron 3 SuperNVIDIA1M$0.085 + 3% $0.0026 = $0.088$0.400 + 3% $0.012 = $0.412ctx 1M · in$0.085 + 3% $0.0026 = $0.088out$0.400 + 3% $0.012 = $0.412
Nemotron 3 Super (free)FreeNVIDIA1MFreeFreectx 1M · inFreeoutFree
GPT-5.4OpenAI1.1M$2.50 + 3% $0.075 = $2.58$15.00 + 3% $0.450 = $15.45ctx 1.1M · in$2.50 + 3% $0.075 = $2.58out$15.00 + 3% $0.450 = $15.45
GPT-5.4 ProOpenAI1.1M$30.00 + 3% $0.900 = $30.90$180.00 + 3% $5.40 = $185.40ctx 1.1M · in$30.00 + 3% $0.900 = $30.90out$180.00 + 3% $5.40 = $185.40
Gemini 3.1 Flash Lite PreviewGoogle1.0M$0.250 + 3% $0.0075 = $0.258$1.50 + 3% $0.045 = $1.54ctx 1.0M · in$0.250 + 3% $0.0075 = $0.258out$1.50 + 3% $0.045 = $1.54
Gemini 3.1 Pro Preview Custom ToolsGoogle1.0M$2.00 + 3% $0.060 = $2.06$12.00 + 3% $0.360 = $12.36ctx 1.0M · in$2.00 + 3% $0.060 = $2.06out$12.00 + 3% $0.360 = $12.36
Qwen3.5-FlashQwen1M$0.065 + 3% $0.0019 = $0.067$0.260 + 3% $0.0078 = $0.268ctx 1M · in$0.065 + 3% $0.0019 = $0.067out$0.260 + 3% $0.0078 = $0.268
GPT-5.3-CodexOpenAI400K$1.75 + 3% $0.052 = $1.80$14.00 + 3% $0.420 = $14.42ctx 400K · in$1.75 + 3% $0.052 = $1.80out$14.00 + 3% $0.420 = $14.42
Gemini 3.1 Pro PreviewGoogle1.0M$2.00 + 3% $0.060 = $2.06$12.00 + 3% $0.360 = $12.36ctx 1.0M · in$2.00 + 3% $0.060 = $2.06out$12.00 + 3% $0.360 = $12.36
Claude Sonnet 4.6Anthropic1M$3.00 + 3% $0.090 = $3.09$15.00 + 3% $0.450 = $15.45ctx 1M · in$3.00 + 3% $0.090 = $3.09out$15.00 + 3% $0.450 = $15.45
Qwen3.5 Plus 2026-02-15Qwen1M$0.260 + 3% $0.0078 = $0.268$1.56 + 3% $0.047 = $1.61ctx 1M · in$0.260 + 3% $0.0078 = $0.268out$1.56 + 3% $0.047 = $1.61
Claude Opus 4.6Anthropic1M$5.00 + 3% $0.150 = $5.15$25.00 + 3% $0.750 = $25.75ctx 1M · in$5.00 + 3% $0.150 = $5.15out$25.00 + 3% $0.750 = $25.75
Palmyra X5Writer1.0M$0.600 + 3% $0.018 = $0.618$6.00 + 3% $0.180 = $6.18ctx 1.0M · in$0.600 + 3% $0.018 = $0.618out$6.00 + 3% $0.180 = $6.18
GPT-5.2-CodexOpenAI400K$1.75 + 3% $0.052 = $1.80$14.00 + 3% $0.420 = $14.42ctx 400K · in$1.75 + 3% $0.052 = $1.80out$14.00 + 3% $0.420 = $14.42
Gemini 3 Flash PreviewGoogle1.0M$0.500 + 3% $0.015 = $0.515$3.00 + 3% $0.090 = $3.09ctx 1.0M · in$0.500 + 3% $0.015 = $0.515out$3.00 + 3% $0.090 = $3.09
GPT-5.2OpenAI400K$1.75 + 3% $0.052 = $1.80$14.00 + 3% $0.420 = $14.42ctx 400K · in$1.75 + 3% $0.052 = $1.80out$14.00 + 3% $0.420 = $14.42
GPT-5.2 ProOpenAI400K$21.00 + 3% $0.630 = $21.63$168.00 + 3% $5.04 = $173.04ctx 400K · in$21.00 + 3% $0.630 = $21.63out$168.00 + 3% $5.04 = $173.04
GPT-5.1-Codex-MaxOpenAI400K$1.25 + 3% $0.037 = $1.29$10.00 + 3% $0.300 = $10.30ctx 400K · in$1.25 + 3% $0.037 = $1.29out$10.00 + 3% $0.300 = $10.30
Nova 2 LiteAmazon1M$0.300 + 3% $0.0090 = $0.309$2.50 + 3% $0.075 = $2.58ctx 1M · in$0.300 + 3% $0.0090 = $0.309out$2.50 + 3% $0.075 = $2.58
GPT-5.1OpenAI400K$1.25 + 3% $0.037 = $1.29$10.00 + 3% $0.300 = $10.30ctx 400K · in$1.25 + 3% $0.037 = $1.29out$10.00 + 3% $0.300 = $10.30
GPT-5.1-CodexOpenAI400K$1.25 + 3% $0.037 = $1.29$10.00 + 3% $0.300 = $10.30ctx 400K · in$1.25 + 3% $0.037 = $1.29out$10.00 + 3% $0.300 = $10.30
GPT-5.1-Codex-MiniOpenAI400K$0.250 + 3% $0.0075 = $0.258$2.00 + 3% $0.060 = $2.06ctx 400K · in$0.250 + 3% $0.0075 = $0.258out$2.00 + 3% $0.060 = $2.06
Nova Premier 1.0Amazon1M$2.50 + 3% $0.075 = $2.58$12.50 + 3% $0.375 = $12.88ctx 1M · in$2.50 + 3% $0.075 = $2.58out$12.50 + 3% $0.375 = $12.88
GPT-5 Image MiniOpenAI400K$2.50 + 3% $0.075 = $2.58$2.00 + 3% $0.060 = $2.06ctx 400K · in$2.50 + 3% $0.075 = $2.58out$2.00 + 3% $0.060 = $2.06
GPT-5 ImageOpenAI400K$10.00 + 3% $0.300 = $10.30$10.00 + 3% $0.300 = $10.30ctx 400K · in$10.00 + 3% $0.300 = $10.30out$10.00 + 3% $0.300 = $10.30
GPT-5 ProOpenAI400K$15.00 + 3% $0.450 = $15.45$120.00 + 3% $3.60 = $123.60ctx 400K · in$15.00 + 3% $0.450 = $15.45out$120.00 + 3% $3.60 = $123.60
Claude Sonnet 4.5Anthropic1M$3.00 + 3% $0.090 = $3.09$15.00 + 3% $0.450 = $15.45ctx 1M · in$3.00 + 3% $0.090 = $3.09out$15.00 + 3% $0.450 = $15.45
Gemini 2.5 Flash Lite Preview 09-2025Google1.0M$0.100 + 3% $0.0030 = $0.103$0.400 + 3% $0.012 = $0.412ctx 1.0M · in$0.100 + 3% $0.0030 = $0.103out$0.400 + 3% $0.012 = $0.412
GPT-5 CodexOpenAI400K$1.25 + 3% $0.037 = $1.29$10.00 + 3% $0.300 = $10.30ctx 400K · in$1.25 + 3% $0.037 = $1.29out$10.00 + 3% $0.300 = $10.30
Qwen3 Coder PlusQwen1M$0.650 + 3% $0.019 = $0.670$3.25 + 3% $0.098 = $3.35ctx 1M · in$0.650 + 3% $0.019 = $0.670out$3.25 + 3% $0.098 = $3.35
Qwen3 Coder FlashQwen1M$0.195 + 3% $0.0059 = $0.201$0.975 + 3% $0.029 = $1.00ctx 1M · in$0.195 + 3% $0.0059 = $0.201out$0.975 + 3% $0.029 = $1.00
Qwen Plus 0728Qwen1M$0.260 + 3% $0.0078 = $0.268$0.780 + 3% $0.023 = $0.803ctx 1M · in$0.260 + 3% $0.0078 = $0.268out$0.780 + 3% $0.023 = $0.803
Qwen Plus 0728 (thinking)Qwen1M$0.260 + 3% $0.0078 = $0.268$0.780 + 3% $0.023 = $0.803ctx 1M · in$0.260 + 3% $0.0078 = $0.268out$0.780 + 3% $0.023 = $0.803
GPT-5OpenAI400K$1.25 + 3% $0.037 = $1.29$10.00 + 3% $0.300 = $10.30ctx 400K · in$1.25 + 3% $0.037 = $1.29out$10.00 + 3% $0.300 = $10.30
GPT-5 MiniOpenAI400K$0.250 + 3% $0.0075 = $0.258$2.00 + 3% $0.060 = $2.06ctx 400K · in$0.250 + 3% $0.0075 = $0.258out$2.00 + 3% $0.060 = $2.06
GPT-5 NanoOpenAI400K$0.050 + 3% $0.0015 = $0.052$0.400 + 3% $0.012 = $0.412ctx 400K · in$0.050 + 3% $0.0015 = $0.052out$0.400 + 3% $0.012 = $0.412
Qwen3 Coder 480B A35BQwen1.0M$0.220 + 3% $0.0066 = $0.227$1.80 + 3% $0.054 = $1.85ctx 1.0M · in$0.220 + 3% $0.0066 = $0.227out$1.80 + 3% $0.054 = $1.85
Qwen3 Coder 480B A35B (free)FreeQwen1.0MFreeFreectx 1.0M · inFreeoutFree
Gemini 2.5 Flash LiteGoogle1.0M$0.100 + 3% $0.0030 = $0.103$0.400 + 3% $0.012 = $0.412ctx 1.0M · in$0.100 + 3% $0.0030 = $0.103out$0.400 + 3% $0.012 = $0.412
Gemini 2.5 FlashGoogle1.0M$0.300 + 3% $0.0090 = $0.309$2.50 + 3% $0.075 = $2.58ctx 1.0M · in$0.300 + 3% $0.0090 = $0.309out$2.50 + 3% $0.075 = $2.58
Gemini 2.5 ProGoogle1.0M$1.25 + 3% $0.037 = $1.29$10.00 + 3% $0.300 = $10.30ctx 1.0M · in$1.25 + 3% $0.037 = $1.29out$10.00 + 3% $0.300 = $10.30
MiniMax M1MiniMax1M$0.400 + 3% $0.012 = $0.412$2.20 + 3% $0.066 = $2.27ctx 1M · in$0.400 + 3% $0.012 = $0.412out$2.20 + 3% $0.066 = $2.27
Gemini 2.5 Pro Preview 06-05Google1.0M$1.25 + 3% $0.037 = $1.29$10.00 + 3% $0.300 = $10.30ctx 1.0M · in$1.25 + 3% $0.037 = $1.29out$10.00 + 3% $0.300 = $10.30
Claude Sonnet 4Anthropic1M$3.00 + 3% $0.090 = $3.09$15.00 + 3% $0.450 = $15.45ctx 1M · in$3.00 + 3% $0.090 = $3.09out$15.00 + 3% $0.450 = $15.45
Gemini 2.5 Pro Preview 05-06Google1.0M$1.25 + 3% $0.037 = $1.29$10.00 + 3% $0.300 = $10.30ctx 1.0M · in$1.25 + 3% $0.037 = $1.29out$10.00 + 3% $0.300 = $10.30
GPT-4.1OpenAI1.0M$2.00 + 3% $0.060 = $2.06$8.00 + 3% $0.240 = $8.24ctx 1.0M · in$2.00 + 3% $0.060 = $2.06out$8.00 + 3% $0.240 = $8.24
GPT-4.1 MiniOpenAI1.0M$0.400 + 3% $0.012 = $0.412$1.60 + 3% $0.048 = $1.65ctx 1.0M · in$0.400 + 3% $0.012 = $0.412out$1.60 + 3% $0.048 = $1.65
GPT-4.1 NanoOpenAI1.0M$0.100 + 3% $0.0030 = $0.103$0.400 + 3% $0.012 = $0.412ctx 1.0M · in$0.100 + 3% $0.0030 = $0.103out$0.400 + 3% $0.012 = $0.412
Llama 4 MaverickMeta AI1.0M$0.150 + 3% $0.0045 = $0.154$0.600 + 3% $0.018 = $0.618ctx 1.0M · in$0.150 + 3% $0.0045 = $0.154out$0.600 + 3% $0.018 = $0.618
Llama 4 ScoutMeta AI10M$0.100 + 3% $0.0030 = $0.103$0.300 + 3% $0.0090 = $0.309ctx 10M · in$0.100 + 3% $0.0030 = $0.103out$0.300 + 3% $0.0090 = $0.309
Qwen-PlusQwen1M$0.260 + 3% $0.0078 = $0.268$0.780 + 3% $0.023 = $0.803ctx 1M · in$0.260 + 3% $0.0078 = $0.268out$0.780 + 3% $0.023 = $0.803
MiniMax-01MiniMax1.0M$0.200 + 3% $0.0060 = $0.206$1.10 + 3% $0.033 = $1.13ctx 1.0M · in$0.200 + 3% $0.0060 = $0.206out$1.10 + 3% $0.033 = $1.13
Auto RouterOpenRouter2MVariableVariablectx 2M · inVariableoutVariable

Prices per 1M tokens, flat 3% fee included. Hover or tap a price for the math.

How to choose

First tradeoff: context size versus real cost. Grok 4.20 and Grok 4.20 Multi-Agent double the window to 2,000,000 tokens at $1.25/$2.50 per M — cheap insurance if you're not sure how long your inputs will run. Second: modality matters more than the spec sheet suggests. Gemini 3.5 Flash and Gemini 3.1 Flash Lite handle text, image, file, audio, and video in one call; DeepSeek V4 Flash and Nemotron 3 Super are text-only but far cheaper per token. Third: don't pay Opus-tier prices ($30/M input on GPT-5.5 Pro, Claude Opus 4.7 Fast) unless the benchmark backs it up — Claude Opus 4.7 gets a rank-1 agenticgamedev result at a sixth of that input price.

Questions

What's the cheapest long-context model on OpenKey?: DeepSeek V4 Flash, at $0.09/M input and $0.18/M output for 1,048,576 tokens of context. On OpenKey that's $0.0927/M input and $0.1854/M output after the flat 3% fee ($0.09 × 1.03, $0.18 × 1.03). It also carries a real benchmark result (design_arena SVG, rank 23).
Which model has the largest context window in this list?: Grok 4.20 and Grok 4.20 Multi-Agent both sit at 2,000,000 tokens, tied with the Pareto Code Router product. Among priced, benchmarked chat models, that's double the 1,000,000-token window most competitors ship.
Are there free long-context models?: Yes. Nemotron 3 Ultra (free) and Nemotron 3 Super (free) both offer 1,000,000-token context at $0/M for input and output — the paid versions carry the same specs and benchmark scores, so the free tier isn't a stripped-down variant here.