Find the best alternative to ChatGPT, Claude, Google Gemini, or the OpenAI API using tracked benchmark performance, token pricing, context window size, and open-weight availability.
BenchLM uses GPT-5.4 as the tracked OpenAI reference for ChatGPT-like performance.
Benchmarks last updated April 16, 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 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
Gemini 3.1 Pro is a strong ChatGPT alternative. It beats GPT-5.4 on BenchLM's general use score. Its blended token price is about 65% lower than GPT-5.4.
Google · Proprietary · 1M context
Gemini 3.1 Pro is a strong ChatGPT alternative. It beats GPT-5.4 on BenchLM's general use score. Its blended token price is about 65% lower than GPT-5.4.
BenchLM fit
88.6
Score vs ref
101%
Token cost
65% cheaper
Alibaba · Proprietary · 1M context
Qwen3.6 Plus is a strong ChatGPT alternative. It still posts a credible 77 score for general use work on BenchLM. Its blended token price is about 100% lower than GPT-5.4.
BenchLM fit
81.7
Score vs ref
83%
Token cost
100% cheaper
xAI · Proprietary · 2M context
Grok 4.20 is a strong ChatGPT alternative. It still posts a credible 77 score for general use work on BenchLM. Its blended token price is about 57% lower than GPT-5.4. It adds a larger 2M context window than the tracked ChatGPT reference.
BenchLM fit
78.5
Score vs ref
83%
Token cost
57% cheaper
Anthropic · Proprietary · 1M context
Claude Mythos Preview is a strong ChatGPT alternative. It beats GPT-5.4 on BenchLM's general use score. It is pricier than GPT-5.4, so the case depends on quality or context-window needs.
BenchLM fit
77.4
Score vs ref
106%
Token cost
747% pricier
Xiaomi · Proprietary · 1M context
MiMo-V2-Pro is a strong ChatGPT alternative. It retains about 90% of GPT-5.4's general use benchmark profile.
BenchLM fit
77.3
Score vs ref
~90%
Token cost
Pricing varies
Z.AI · Open Weight · 203K context
GLM-5.1 is a strong ChatGPT alternative. It retains about 90% of GPT-5.4's general use benchmark profile. Its blended token price is about 68% lower than GPT-5.4. It is also open-weight, so you can self-host or fine-tune it.
BenchLM fit
77.2
Score vs ref
90%
Token cost
68% 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-5.4 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.