GPT-4 Turbo Preview alternatives
Match · Updated July 2026
The closest alternative to GPT-4 Turbo Preview is GPT-5.6 Luna Pro — comparable intelligence (— vs —); for a cheaper option, Claude Opus 5 runs $5.00/M vs $10.00/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: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
claude-opus-4.8:batch
$2.50/M input · 55.7 intel
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 Turbo Preview?
GPT-5.6 Luna Pro is the closest alternative to GPT-4 Turbo Preview, with an Intelligence Index of — (GPT-4 Turbo Preview scores —) at $0.100 per million input tokens.
Is there a cheaper alternative to GPT-4 Turbo Preview?
Yes — Claude Opus 5 costs $5.00 per million input tokens versus $10.00 for GPT-4 Turbo Preview, while staying within ~8 points of its Intelligence Index.
Is there an open-source alternative to GPT-4 Turbo Preview?
Kimi K3 is the strongest open-weight alternative to GPT-4 Turbo Preview — downloadable from Hugging Face and self-hostable, scoring 57.1 on intelligence.