What is context length in AI models?

Context length is the maximum amount of information (in tokens) a model can process at once. A 1M-token context can handle roughly 750,000 words — equivalent to an entire novel.

Which models have the largest context windows?

Gemini 3.1/3.5 Pro leads with up to 2M tokens, followed by several 1M-token models including DeepSeek V4, Qwen3.7, and GPT-5.5 variants.

Does longer context mean higher cost?

Yes, you pay per token. However, Routeway's caching and competitive pricing help minimize costs for long-context workloads.

Best Long-Context AI Models

Browse AI models with massive context windows (200K+ tokens) for analyzing large documents and codebases.

All Models Roleplay Coding Math & Logic Long Context Cheapest Open Source Daily Use

GLM 5.3

Z.ai

Function Call

Reasoning

LLM

$1.40 in / $4.40 out

/M Tokens

Gemini 3.7 Flash

Google

Vision

Function Call

Reasoning

FlexPriority

$0.75 in / $3.75 out

/M Tokens

DeepSeek V4 Pro 0813

DeepSeek

Function Call

Reasoning

LLM

$1.30 in / $2.50 out

/M Tokens

Grok 4.6

xAI

Vision

Function Call

Reasoning

$2.00 in / $6.00 out

/M Tokens

Nemotron 3.5 Lightning

NVIDIA

Function Call

Reasoning

LLM

$0.10 in / $0.20 out

/M Tokens

Seed 2.0 Code

ByteDance

Vision

Function Call

Reasoning

$0.50 in / $3.00 out

/M Tokens

Muse Spark 1.2

Meta

Vision

Function Call

Reasoning

$1.25 in / $4.25 out

/M Tokens

Qwen3.8 Max

Qwen

Vision

Function Call

Reasoning

$2.00 in / $6.00 out

/M Tokens

DeepSeek V4 Flash 0731

DeepSeek

Function Call

Reasoning

LLM

$0.14 in / $0.28 out

/M Tokens

Claude Opus 5

Anthropic

Vision

Function Call

Reasoning

5% off

$4.75 in / $23.75 out

/M Tokens

Gemini 3.5 Flash Lite

Google

Vision

Function Call

Reasoning

FlexPriority

$0.25 in / $1.50 out

/M Tokens

Gemini 3.6 Flash

Google

Vision

Function Call

Reasoning

FlexPriority

$1.50 in / $7.50 out

/M Tokens

Laguna S 2.1

Poolside

Function Call

Reasoning

LLM

$0.10 in / $0.20 out

/M Tokens

Kimi K3

MoonshotAI

Vision

Function Call

Reasoning

$3.00 in / $15.00 out

/M Tokens

Inkling

Thinking Machines

Vision

Function Call

Reasoning

$1.00 in / $4.05 out

/M Tokens

GPT 5.6 Luna

OpenAI

Vision

Function Call

Reasoning

FlexPriority

$1.00 in / $6.00 out

/M Tokens

GPT 5.6 Luna Pro

OpenAI

Vision

Function Call

Reasoning

FlexPriority

$1.00 in / $6.00 out

/M Tokens

GPT 5.6 Sol

OpenAI

Vision

Function Call

Reasoning

FlexPriority

$5.00 in / $30.00 out

/M Tokens

GPT 5.6 Sol Pro

OpenAI

Vision

Function Call

Reasoning

FlexPriority

$5.00 in / $30.00 out

/M Tokens

GPT 5.6 Terra

OpenAI

Function Call

Reasoning

LLM

FlexPriority

$2.50 in / $15.00 out

/M Tokens

GPT 5.6 Terra Pro

OpenAI

Vision

Function Call

Reasoning

FlexPriority

$2.50 in / $15.00 out

/M Tokens

Muse Spark 1.1

Meta

Function Call

Reasoning

LLM

$1.25 in / $4.25 out

/M Tokens

Grok 4.5

xAI

Vision

Function Call

Reasoning

$2.00 in / $6.00 out

/M Tokens

Hy3

Tencent

Function Call

Reasoning

LLM

$0.10 in / $0.60 out

/M Tokens

Claude Sonnet 5

Anthropic

Vision

Function Call

Reasoning

5% off

$1.90 in / $9.50 out

/M Tokens

Fugu Ultra

Sakana

Vision

Function Call

Reasoning

$5.00 in / $30.00 out

/M Tokens

North Mini Code 1.0

Cohere

Function Call

Reasoning

LLM

$0.20 in / $0.80 out

/M Tokens

GLM 5.2

Z.ai

Function Call

Reasoning

LLM

$1.40 in / $4.40 out

/M Tokens

Kimi K2.7 Code

MoonshotAI

Vision

Function Call

Reasoning

$0.95 in / $4.00 out

/M Tokens

MiMo V2.5 Pro UltraSpeed

Xiaomi

Function Call

Reasoning

LLM

$1.50 in / $3.00 out

/M Tokens

Claude Fable 5

Anthropic

Vision

Function Call

Reasoning

$10.00 in / $50.00 out

/M Tokens

Nemotron 3 Ultra 550B

NVIDIA

Function Call

Reasoning

LLM

$0.50 in / $2.50 out

/M Tokens

MiniMax M3

MiniMax

Vision

Function Call

Reasoning

$0.32 in / $1.26 out

/M Tokens

Qwen 3.7 Plus

Qwen

Vision

Function Call

Reasoning

$0.42 in / $1.68 out

/M Tokens

Step 3.7 Flash

StepFun

Vision

Function Call

Reasoning

$0.20 in / $1.15 out

/M Tokens

Step 3.7 Flash (Free)

StepFun

Vision

Function Call

Reasoning

$0.00 in / $0.00 out

/M Tokens

Claude Opus 4.8

Anthropic

Vision

Function Call

Reasoning

5% off

$4.75 in / $23.75 out

/M Tokens

Qwen 3.7 Max

Qwen

Vision

Function Call

Reasoning

$2.38 in / $7.13 out

/M Tokens

Gemini 3.5 Flash

Google

Vision

Function Call

Reasoning

FlexPriority

5% off

$1.42 in / $8.55 out

/M Tokens

Gemma 4 31B Mero Artemis v0.3.1

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B Novelist

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B SDFT Heretic RP

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Qwen3.5 27B Blossom V6.4 Derestricted

Qwen

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Qwen3.5 27B Claude 4.6 Opus Reasoning Distilled Derestricted

Qwen

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Qwen3.5 27B Claude 4.6 Opus Reasoning Distilled Derestricted Lite

Qwen

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

MiroThinker 1.7 Deep Research

MiroMindAI

Reasoning

LLM

$4.00 in / $25.00 out

/M Tokens

MiroThinker 1.7 Deep Research Mini

MiroMindAI

Reasoning

LLM

$1.25 in / $10.00 out

/M Tokens

Gemma 4 31B Agares v1

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B Animus V14.1

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B AssGuard

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B Claude 4.6 Opus Reasoning Distilled

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B Cognitive Unshackled

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B Dark Gemistry

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B DarkIdol

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B Fabled

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B Garnet V2

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B Gembrain Uncensored Heretic

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B Gembrain X Core

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B Isometry RP

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B MeroMero

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B Queen

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Gemma 4 31B StyleTune

Google

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Grok 4.3

xAI

Vision

Function Call

Reasoning

$1.19 in / $2.38 out

/M Tokens

Qwen 3.5 27B BlueStar v3 Derestricted

Qwen

Vision

Reasoning

LLM

$0.28 in / $0.28 out

/M Tokens

Granite 4.1 8B

IBM

Vision

Function Call

Reasoning

$0.04 in / $0.09 out

/M Tokens

DeepSeek V4 Flash

DeepSeek

Function Call

Reasoning

LLM

$0.12 in / $0.25 out

/M Tokens

DeepSeek V4 Pro

DeepSeek

Function Call

Reasoning

LLM

$1.57 in / $3.13 out

/M Tokens

GPT 5.5

OpenAI

Vision

Function Call

Reasoning

FlexPriority

5% off

$4.75 in / $28.50 out

/M Tokens

Qwen3.6 27B

Qwen

Vision

Function Call

Reasoning

$0.54 in / $3.24 out

/M Tokens

MiMo V2.5

Xiaomi

Vision

Function Call

Reasoning

$0.14 in / $0.28 out

/M Tokens

MiMo V2.5 Pro

Xiaomi

Vision

Function Call

Reasoning

$0.43 in / $0.87 out

/M Tokens

Qwen3.6 Max Preview

Qwen

Function Call

Reasoning

LLM

$1.17 in / $7.41 out

/M Tokens

Qwen3.6 35B A3B

Qwen

Vision

Function Call

Reasoning

$0.27 in / $1.57 out

/M Tokens

Qwen3.6 Flash

Qwen

Vision

Function Call

Reasoning

$0.18 in / $1.04 out

/M Tokens

Claude Opus 4.7

Anthropic

Vision

Function Call

Reasoning

5% off

$4.75 in / $23.75 out

/M Tokens

Kimi K2.6

MoonshotAI

Vision

Function Call

Reasoning

$0.57 in / $2.85 out

/M Tokens

GLM 5.1

Z.ai

Function Call

Reasoning

LLM

$0.83 in / $2.48 out

/M Tokens

Gemma 4 26B A4B

Google

Vision

Function Call

Reasoning

$0.11 in / $0.36 out

/M Tokens

Gemma 4 31B

Google

Vision

Function Call

Reasoning

$0.11 in / $0.33 out

/M Tokens

Gemma 4 31B (Free)

Google

Vision

Function Call

Reasoning

$0.00 in / $0.00 out

/M Tokens

GPT 5.4 Mini

OpenAI

Vision

Function Call

Reasoning

FlexPriority

5% off

$0.71 in / $4.28 out

/M Tokens

GPT 5.4 Nano

OpenAI

Vision

Function Call

Reasoning

Flex

5% off

$0.19 in / $1.19 out

/M Tokens

GPT 5.4

OpenAI

Vision

Function Call

Reasoning

FlexPriority

5% off

$2.38 in / $14.25 out

/M Tokens

GPT 5.3 Codex

OpenAI

Vision

Function Call

Reasoning

Priority

5% off

$1.66 in / $13.30 out

/M Tokens

Qwen 3.5 122B A10B

Qwen

Vision

Reasoning

LLM

$0.37 in / $2.94 out

/M Tokens

Qwen 3.5 27

Qwen

Vision

Reasoning

LLM

$0.28 in / $2.20 out

/M Tokens

Qwen 3.5 35B A3B

Qwen

Vision

Reasoning

LLM

$0.18 in / $0.46 out

/M Tokens

Qwen 3.5 Flash

Qwen

Vision

Reasoning

LLM

$0.09 in / $0.37 out

/M Tokens

Gemini 3.1 Pro (Preview)

Google

Vision

Function Call

Reasoning

FlexPriority

5% off

$1.90 in / $11.40 out

/M Tokens

Claude Sonnet 4.6

Anthropic

Vision

Function Call

LLM

5% off

$2.85 in / $14.25 out

/M Tokens

MiniMax M2.5

MiniMax

Function Call

Reasoning

LLM

$0.34 in / $1.37 out

/M Tokens

GLM 5

Z.ai

Function Call

Reasoning

LLM

$0.30 in / $2.55 out

/M Tokens

Claude Opus 4.6

Anthropic

Vision

Function Call

LLM

5% off

$4.50 in / $22.50 out

/M Tokens

Step 3.5 Flash

StepFun

LLM

$0.10 in / $0.30 out

/M Tokens

Kimi K2.5

MoonshotAI

Vision

Function Call

Reasoning

$0.34 in / $2.17 out

/M Tokens

GLM 4.7

Z.AI

Function Call

Reasoning

LLM

$0.15 in / $0.80 out

/M Tokens

Nemotron 3 Nano 30B A3B

NVIDIA

Function Call

Reasoning

LLM

$0.10 in / $0.15 out

/M Tokens

Nemotron 3 Nano 30B A3B (Free)

NVIDIA

Function Call

Reasoning

LLM

$0.00 in / $0.00 out

/M Tokens

GPT 5.2

OpenAI

Vision

Function Call

Reasoning

FlexPriority

5% off

$1.66 in / $13.30 out

/M Tokens

Devstral 2 2512

Mistral

Function Call

LLM

$0.15 in / $0.60 out

/M Tokens

Grok 4.1 Fast

xAI

Vision

Function Call

Reasoning

$0.19 in / $0.48 out

/M Tokens

GPT 5.1

OpenAI

Vision

Function Call

Reasoning

5% off

$1.19 in / $9.50 out

/M Tokens

Kimi K2 Thinking

MoonshotAI

Function Call

Reasoning

LLM

$0.30 in / $2.00 out

/M Tokens

GLM 4.6

Z.AI

Function Call

Reasoning

LLM

$0.43 in / $1.75 out

/M Tokens

Grok 4 Fast

xAI

Vision

Function Call

Reasoning

$0.19 in / $0.48 out

/M Tokens

Qwen3 235B A22B Instruct 2507

Alibaba

Function Call

LLM

$0.18 in / $0.70 out

/M Tokens

Qwen3 235B A22B Thinking 2507

Alibaba

Function Call

Reasoning

LLM

$0.18 in / $0.70 out

/M Tokens

Kimi K2 0905

MoonshotAI

Vision

Function Call

Reasoning

$0.39 in / $1.90 out

/M Tokens

Grok Code Fast 1

xAI

Function Call

Reasoning

LLM

$0.19 in / $1.43 out

/M Tokens

Claude Opus 4

Anthropic

Vision

Function Call

LLM

5% off

$13.50 in / $67.50 out

/M Tokens

Claude Opus 4.1

Anthropic

Vision

Function Call

LLM

5% off

$13.50 in / $67.50 out

/M Tokens

Command A Reasoning

Cohere

Function Call

Reasoning

LLM

$2.30 in / $10.00 out

/M Tokens

GPT-5

OpenAI

Vision

Function Call

Reasoning

FlexPriority

5% off

$0.63 in / $5.00 out

/M Tokens

GPT-5 Mini

OpenAI

Vision

Function Call

Reasoning

FlexPriority

5% off

$0.13 in / $1.00 out

/M Tokens

GPT-5-Nano

OpenAI

Vision

Function Call

Reasoning

Flex

5% off

$0.05 in / $0.20 out

/M Tokens

Grok 4

xAI

Vision

Function Call

Reasoning

$2.85 in / $14.25 out

/M Tokens

Gemini 2.5 Flash

Google

Vision

Function Call

LLM

5% off

$0.27 in / $2.25 out

/M Tokens

Gemini 2.5 Pro

Google

Vision

Function Call

LLM

5% off

$2.25 in / $9.00 out

/M Tokens

GPT-4.1

OpenAI

Vision

Function Call

LLM

Priority

5% off

$1.00 in / $4.00 out

/M Tokens

GPT-4.1 Nano

OpenAI

Vision

Function Call

LLM

$0.40 in / $1.60 out

/M Tokens

Llama 4 Maverick

Meta

Vision

Function Call

LLM

$0.11 in / $0.44 out

/M Tokens

Llama 4 Scout

Meta

Vision

Function Call

LLM

$0.10 in / $0.23 out

/M Tokens

Command A (03-2025)

Cohere

Function Call

LLM

$2.20 in / $10.00 out

/M Tokens

o3 Mini

OpenAI

Function Call

Reasoning

LLM

$1.10 in / $4.40 out

/M Tokens