Find the best alternative to ChatGPT, Claude, Google Gemini, GLM, Kimi, or the OpenAI API using tracked benchmark performance, token pricing, context window size, and open-weight availability.
BenchLM uses GPT-5.5 as the tracked OpenAI reference for ChatGPT-like performance.
Benchmarks last updated May 1, 2026. Token pricing and context are used to break ties and surface the strongest real-world replacements, not just the absolute benchmark leader.
Best ChatGPT Alternatives in 2026
chatgpt alternatives
Best Claude Alternatives in 2026
claude alternative
Best Google Gemini Alternatives in 2026
google gemini alternative
Best OpenAI API Alternatives in 2026
openai api alternative
Best GLM Alternatives in 2026
glm alternative
Best Kimi Alternatives in 2026
kimi alternative
Best Free ChatGPT Alternatives in 2026
free chatgpt alternative
Best Open Source ChatGPT Alternatives in 2026
open source chatgpt alternative
Best Claude Alternatives for Coding in 2026
claude alternative for coding
Best current fit for ChatGPT
DeepSeek V4 Pro (Max) is a strong ChatGPT alternative. It retains about 97% of GPT-5.5's general use benchmark profile. Its blended token price is about 86% lower than GPT-5.5. It is also open-weight, so you can self-host or fine-tune it.
DeepSeek · Open Weight · 1M context
DeepSeek V4 Pro (Max) is a strong ChatGPT alternative. It retains about 97% of GPT-5.5's general use benchmark profile. Its blended token price is about 86% lower than GPT-5.5. It is also open-weight, so you can self-host or fine-tune it.
BenchLM fit
89.4
Score vs ref
97%
Token cost
86% cheaper
Google · Proprietary · 1M context
Gemini 3.1 Pro is a strong ChatGPT alternative. It beats GPT-5.5 on BenchLM's general use score. Its blended token price is about 60% lower than GPT-5.5.
BenchLM fit
87.9
Score vs ref
101%
Token cost
60% cheaper
Mistral · Open Weight · 256K context
Mistral Medium 3.5 128B is a strong ChatGPT alternative. It beats GPT-5.5 on BenchLM's general use score. Its blended token price is about 75% lower than GPT-5.5. It is also open-weight, so you can self-host or fine-tune it.
BenchLM fit
85.2
Score vs ref
~104%
Token cost
75% cheaper
xAI · Proprietary · 1M context
Grok 4.3 is a strong ChatGPT alternative. It still posts a credible 79 score for general use work on BenchLM. Its blended token price is about 90% lower than GPT-5.5.
BenchLM fit
83
Score vs ref
87%
Token cost
90% cheaper
xAI · Proprietary · 1M context
Grok 4.1 is a strong ChatGPT alternative. It retains about 99% of GPT-5.5's general use benchmark profile.
BenchLM fit
81.7
Score vs ref
~99%
Token cost
Pricing unavailable
Google · Proprietary · 2M context
Gemini 3 Pro is a strong ChatGPT alternative. It still posts a credible 81 score for general use work on BenchLM. Its blended token price is about 60% lower than GPT-5.5. It adds a larger 2M context window than the tracked ChatGPT reference.
BenchLM fit
81.6
Score vs ref
89%
Token cost
60% cheaper
This finder is strongest when the real buying question is not just “what is the best model?” but “what can replace my current default without wrecking cost, quality, or context limits?” Use the result cards to jump into direct compare pages, pricing, and model profiles before you switch providers.
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BenchLM scores alternatives from tracked benchmark performance first, then adjusts for token price, context window, and open-weight preference. The weighting shifts depending on whether you choose balanced fit, lower cost, open-weight, or coding performance.
BenchLM tracks model families rather than closed chat products directly. For ChatGPT-like comparisons, the finder uses GPT-5.5 as the current OpenAI benchmark reference so the ranking stays grounded in measurable model data.
Cheaper uses a blended token-cost estimate with 35% input price and 65% output price. That gives more weight to the output side because many production workflows spend more on generated tokens than prompt tokens.
Yes. Set model type to open-weight only or switch the goal to open-weight first. That pushes self-hostable models higher and removes proprietary APIs when you want maximum control.