Best Long-Context LLM in 2026
Feeding an entire codebase, book, or document set into one prompt needs a genuinely large context window. This list covers models with 1M+ token windows on Ofox, ranked so you get both the capacity and the quality to actually use all of it.
Recommended models
anthropic/claude-opus-4.8 · Anthropicopenai/gpt-5.5 · OpenAIgoogle/gemini-3.5-flash · googlez-ai/glm-5.2 · Zhipux-ai/grok-4.20 · xaideepseek/deepseek-v4-pro · DeepSeekNeed something more specific?
Open the interactive finder with this scenario pre-filled, then adjust your priorities and required capabilities to fine-tune the shortlist.
Refine in the finderHow we ranked these
Each model on Ofox is scored on quality (model tier, reasoning, recency), cost (live per-token pricing), speed, and how well it fits this use case. Rankings update automatically as new models launch and prices change, so this list stays current.
Related questions
Frequently asked questions
How does the Model Finder pick models?+
It scores every non-deprecated model on Ofox across four axes — quality, cost, speed, and fit for your use case — then weights them by the priority you choose. Quality reflects model tier and capabilities, cost uses real per-token pricing, and fit measures whether a model is tuned for your task (coding, vision, long context, and so on).
Is it free? Do I need an account?+
Yes, it's completely free and runs in your browser — no login or API key needed to get recommendations. You only need an Ofox account when you're ready to actually call a model.
Are these real, up-to-date models?+
Every recommendation comes from the live Ofox catalog of 100+ models, refreshed continuously. The pricing and context windows shown are pulled directly from the catalog.
Why doesn't the cheapest model always rank first?+
Unless you pick 'Lowest cost', the finder balances price against quality and capability. A model that costs a little more but is much more capable will often score higher — just like a person would choose.
Can I use the recommended models with my existing code?+
Yes. Every model is available through one OpenAI-, Anthropic-, or Gemini-compatible endpoint. Change the base URL and API key and your existing SDK works unchanged.