gpt-oss-120b alternatives
Match · Updated July 2026
The closest alternative to gpt-oss-120b is Claude Haiku 4.5 — comparable intelligence (23.7 vs 23.8); for a cheaper option, GPT-5 Nano (batch) runs $0.025/M vs $0.037/M; and the best open-weight substitute is Kimi K3.
Closest match
Cheaper alternatives
Smarter alternatives
qwen3-max
24.0 intel · $0.780/M
deepseek-v3.2
24.7 intel · $0.269/M
gemini-3.1-flash-lite
25.0 intel · $0.250/M
gemini-3.1-flash-lite:batch
25.0 intel · $0.125/M
gemini-3.1-flash-lite-preview
25.0 intel · $0.250/M
gpt-5-mini
25.3 intel · $0.250/M
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-oss-120b?
Claude Haiku 4.5 is the closest alternative to gpt-oss-120b, with an Intelligence Index of 23.7 (gpt-oss-120b scores 23.8) at $1.00 per million input tokens.
Is there a cheaper alternative to gpt-oss-120b?
Yes — GPT-5 Nano (batch) costs $0.025 per million input tokens versus $0.037 for gpt-oss-120b, while staying within ~8 points of its Intelligence Index.
Is there an open-source alternative to gpt-oss-120b?
Kimi K3 is the strongest open-weight alternative to gpt-oss-120b — downloadable from Hugging Face and self-hostable, scoring 57.1 on intelligence.