Which is cheaper, Gpt Oss 120b or Gpt 5.1 Codex?
Gpt Oss 120b costs $0.35/M input; Gpt 5.1 Codex costs $1.25/M input. Price spread matters at billion-token scale.
Gateway catalog snapshot.
Gpt Oss 120b is cheaper at $0.35/M input vs $1.25/M input for Gpt 5.1 Codex. Compare context, hosts, and o10 routing bands.
Last updated: 2026-06-27. Full catalog. Reference prices are dated snapshots. Compare total cost and measured task quality before choosing a route.
Gpt Oss 120b vs Gpt 5.1 Codex. Price, context, routing
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AnswersSelf-contained
How do Gpt Oss 120b and Gpt 5.1 Codex context windows compare?
Gpt Oss 120b: 131,072 tokens. Gpt 5.1 Codex: 400,000 tokens.
01Deep dive
Comparison summary
Gpt Oss 120b is cheaper at $0.35/M input vs $1.25/M input for Gpt 5.1 Codex. Compare context, hosts, and o10 routing bands.
Gpt Oss 120b is cheaper at $0.35/M input vs $1.25/M input for Gpt 5.1 Codex. Compare context, hosts, and o10 routing bands.
SourceMethodology
o10 gateway + fulfillment catalog snapshot.
FAQFrequently asked questions
Common questions
Which is cheaper, Gpt Oss 120b or Gpt 5.1 Codex?
Gpt Oss 120b at $0.35/M input vs $1.25/M for Gpt 5.1 Codex.
Can you run both on the same hosts?
Gpt Oss 120b: OpenAI, SambaNova. Gpt 5.1 Codex: OpenAI.