GPT-4 alternatives
Match · Updated July 2026
The closest alternative to GPT-4 is GLM 4.5V — comparable intelligence (7.0 vs 7.0); for a cheaper option, Claude Opus 5 runs $5.00/M vs $30.00/M; and the best open-weight substitute is Kimi K3.
Closest match
Cheaper alternatives
claude-opus-5
$5.00/M input · 60.7 intel
claude-fable-5
$10.00/M input · 59.9 intel
claude-fable-5:batch
$5.00/M input · 59.9 intel
gpt-5.6-sol
$5.00/M input · 58.9 intel
kimi-k3
$3.00/M input · 57.1 intel
claude-opus-4.8
$5.00/M input · 55.7 intel
Smarter alternatives
Open-source alternatives
kimi-k3
57.1 intel · open weights · 1.0M ctx
glm-5.2
51.1 intel · open weights · 1.0M ctx
minimax-m3
44.4 intel · open weights · 1.0M ctx
minimax-m3:batch
44.4 intel · open weights · 524K ctx
deepseek-v4-pro
44.3 intel · open weights · 1.0M ctx
kimi-k2.6
44.2 intel · open weights · 262K ctx
Frequently asked
What is the best alternative to GPT-4?
GLM 4.5V is the closest alternative to GPT-4, with an Intelligence Index of 7.0 (GPT-4 scores 7.0) at $0.600 per million input tokens.
Is there a cheaper alternative to GPT-4?
Yes — Claude Opus 5 costs $5.00 per million input tokens versus $30.00 for GPT-4, while staying within ~8 points of its Intelligence Index.
Is there an open-source alternative to GPT-4?
Kimi K3 is the strongest open-weight alternative to GPT-4 — downloadable from Hugging Face and self-hostable, scoring 57.1 on intelligence.