Home / Compare / Claude Haiku 4.5 vs gpt-oss-120b

Claude Haiku 4.5 vs gpt-oss-120b

For a typical chat reply (2,000 tokens in, 400 out), Claude Haiku 4.5 costs 7.4× as much as gpt-oss-120b: $4.00 against $0.54 per 1,000 requests at list price on 2026-09-28.

Claude Haiku 4.5gpt-oss-120b
Input, per 1M tokens$1.00$0.15
Output, per 1M tokens$5.00$0.60
Context window200K131K
Classification or routing (600 tokens in, 10 out), per 1,000$0.65$0.096
Chat reply (2,000 in, 400 out), per 1,000$4.00$0.54
Retrieval-augmented answer (8,000 in, 500 out), per 1,000$10.50$1.50
Confidence signalnoyes
Tool callingyesyes
BANKING77, correct of 400301329

Which one should carry your traffic?

If gpt-oss-120b answers your requests as well as Claude Haiku 4.5, moving that traffic saves 87% on chat-shaped requests. Averages cannot tell you whether it does for your requests. gpt-oss-120b exposes a confidence signal, so Gimbix can let it answer first and hand unsure cases to Claude Haiku 4.5.

Claude Haiku 4.5 profile · gpt-oss-120b profile · Measure it on your traffic