AI Models · Open-Source Alternatives
Open-Source Alternatives to 
GPT-5.5
The best open-weight, self-hostable alternatives to GPT-5.5 in 2026 — compared on price, context window and capabilities. Run them locally and cut API costs.
Refreshed from live data · olud.ai
The best open-weight alternatives to GPT-5.5
GPT-5.5 is a proprietary, API-only model. These open-weight models can be self-hosted, run offline and used at a fraction of the cost — here's how the top ones stack up.
No open-weight match today
No open-weight model currently sits within 3 points of GPT-5.5 on the Artificial Analysis intelligence index while matching its context window and input types. We would rather say so than list models that do not compare.
Browse the full open-weight leaderboard →See the full open-source leaderboard
Live ranking of open-weight models with pricing, context windows and capabilities.
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