1stTop pick
Researched 50d agoGPT-5.6 Sol
- Context
- 1.05m
- Output (from)
- $30.00 / 1M
Best Long Context LLMs (2026)
Last refreshed 2026-08-28. Next refresh: weekly.
LLMs with the largest context windows in 2026 — from 128K to 2M tokens. Ranked by window size with pricing and retrieval accuracy.
Release watch. Gemini 3.5 Pro is tracked with a 2M-token context window while it remains in preview.
Verdict
Use GPT-5.6 Sol for long-context work today.
GPT-5.6 Terra is the runner-up: 1.05m vs 1.05m on Context.
2ndShortlist
Researched 50d agoGPT-5.6 Terra
- Context
- 1.05m
- Output (from)
- $15.00 / 1M
3rdShortlist
Researched 50d agoGPT-5.6 Luna
- Context
- 1.05m
- Output (from)
- $6.00 / 1M
How we rank
Long-context leaders sort by the widest shipped context window first, then recency — benchmarks matter, but literal window size is the gate for this category.
- Eligibility — Models with ≥128k tokens of declared context and not deprecated.
- Primary ranking — Larger parsed context wins; newer release on ties.
- Variant collapse — We keep one row per model family (`familySlug` + parameter tier). When headline scores tie within ±0.5 pt (±10 Elo on Chatbot Arena), we pick the canonical SKU by lowest tracked input price, then GA over preview or limited access, then newest `release`. A folded sibling within the benchmark noise band can show a "Tied within margin" chip on that score cell.
- Pricing — Lowest tracked provider rates where available.
| # | Model | Input $/1M | Output $/1M | |
|---|---|---|---|---|
| 1 | RWKV-7 Goose 2.9B | — | — | |
| 2 | RWKV-7 Goose 1.5B | — | — | |
| 3 | RWKV-7 Goose 0.4B | — | — | |
| 4 | RWKV-7 Goose 0.1B | — | — | |
| 5 | RWKV-6 Finch 14B | — | — | |
| 6 | RWKV-6 Finch 7B | — | — | |
| 7 | RWKV-6 Finch 3B | — | — | |
| 8 | RWKV-6 Finch 1.6B | — | — | |
| 9 | LTM-2-mini | — | — | |
| 10 | Llama 4 Scout 17B-16E Instruct Vision | $0.08 | $0.22 | |
| 11 | LTM-1 | — | — | |
| 12 | MiniMax-01 Vision | $0.20 | $1.10 | |
| 13 | Gemini 3.5 Pro PreviewReasoningVision | — | — | |
| 14 | Gemini 1.5 Pro 002 | — | — | |
| 15 | Gemini 1.5 Pro Experimental 0827 | — | — | |
| 16 | Gemini 1.5 Pro Experimental 0801 | — | — | |
| 17 | Gemini 1.5 Pro | $1.25 | $5.00 | |
| 18 | GPT-5.6 Sol ReasoningVisionTools | $5.00 | $30.00 | |
| 19 | GPT-5.6 Terra ReasoningVisionTools | $2.50 | $15.00 | |
| 20 | GPT-5.6 Luna ReasoningVisionTools | $1.00 | $6.00 | |
| 21 | GPT-5.5 ReasoningVisionTools | $5.00 | $30.00 | |
| 22 | GPT-5.5 Pro ReasoningVisionTools | $30.00 | $180.00 | |
| 23 | GPT-5.4 ReasoningVisionTools | $2.50 | $15.00 | |
| 24 | GPT-5.4 Pro ReasoningVisionTools | $30.00 | $180.00 | |
| 25 | Gemini Omni 1.1 Flash Vision | $1.50 | $17.50 | |
| 26 | Gemini 3.7 Flash ReasoningVisionTools | $0.75 | $3.75 | |
| 27 | Muse Spark 1.2 PreviewReasoningVisionTools | $1.25 | $4.25 | |
| 28 | Gemini 3.6 Flash ReasoningVisionTools | $1.50 | $7.50 | |
| 29 | Gemini 3.5 Flash-Lite ReasoningVisionTools | $0.30 | $2.50 | |
| 30 | Kimi K3 ReasoningVisionTools | $3.00 | $15.00 | |
| 31 | Gemini 3.5 Flash ReasoningVisionTools | $1.50 | $9.00 | |
| 32 | Antigravity Agent PreviewReasoningVision | — | — | |
| 33 | Gemini 3.1 Flash-Lite VisionTools | $0.25 | $1.50 | |
| 34 | Xiaomi MiMo-V2.5-Pro Tools | $0.43 | $0.87 | |
| 35 | Xiaomi MiMo-V2.5 ReasoningVisionTools | $0.14 | $0.28 | |
| 36 | Nemotron-Cascade-2-30B-A3B | — | — | |
| 37 | MiMo-V2-Pro | $1.00 | $3.00 | |
| 38 | Nemotron 3 Super-120B-A12B | $0.09 | $0.45 | |
| 39 | Gemini 2.5 Pro Computer Use Preview PreviewVisionTools | $1.25 | $10.00 | |
| 40 | Llama 3 70B Gradient 1048K | — | — |
Honorable mentions
Next seats in this ranking. Lines below are from each model's stored description in LLMReference seed data—spot-check the model page before relying on a capability claim.
- #4GPT-5.5
GPT-5.5 is OpenAI's fully retrained agentic model, released April 23, 2026. Optimised for agentic coding, computer use, knowledge work, and early scientific research. Achieves 82.7% on Terminal-Bench 2.0 (Codex CLI scaffold), 84.9% on GDPval, 58.6% on SWE-Bench Pro, 93.6% on GPQA Diamond, and 82.6% on SWE-Bench Verified (Vals.ai independent harness). Knowledge cutoff December 2025. Supports reasoning effort levels (none/low/medium/high/xhigh). Context window 1,050,000 tokens with a long-context surcharge above 272K tokens. Model ID: gpt-5.5.
1.05m
Context
GPT-5.5 Pro is OpenAI's premium extra-compute deployment of GPT-5.5, released April 23, 2026. It uses the same underlying weights as GPT-5.5 standard with additional parallel test-time compute for harder tasks. Supports text and image inputs, reasoning effort control, tool use, structured outputs, code execution, a 1,050,000-token context window, and 128K max output. Key datapack rows: Terminal-Bench 2.1 78.2%, SWE-bench Pro 58.6%, GPQA Diamond 93.6%, ARC-AGI-2 high effort 83.3%, BrowseComp Pro compute 90.1%, and FrontierMath Tier 4 39.6%. Official pricing is $30/M input, $180/M output, $10/M batch input, and $45/M batch output; native cached input discount is not listed.
1.05m
Context
- #6GPT-5.4
GPT-5.4 is OpenAI's flagship frontier reasoning model, released March 5, 2026. It incorporates advances from GPT-5.3-Codex for coding and agentic workflows, and adds 'Thinking' mode with editable reasoning plans. Key capabilities include computer use (navigating interfaces via Playwright), image understanding and generation integration, full-stack web app generation, tool calling, and deep research. Knowledge cutoff is August 31, 2025. Model ID: gpt-5.4.
1.05m
Context
Compare Top Picks
Side-by-side comparison of the top picks by price, benchmark, and API access.
Browse Other Categories
Best LLMs for Code GenerationBest LLMs for RAGBest LLMs for Agents & Coding (2026)Best LLMs for ClassificationBest Open Source LLMsBest Multimodal / Vision LLMsBest LLM for Translation in 2026Best AI Image Models in 2026Best AI Video Models in 2026Best LLMs for Reasoning & MathBest Small Language Models (SLMs)Best LLMs for JSON / Tool useCheapest LLM APIs You Can Call Right NowBest Mainstream LLM APIs, RankedBest LLMs for EnterpriseBest Free LLMs You Can Use Right NowBest LLMs for WritingBest LLMs for MarketingBest LLMs for Customer Support