Which is cheaper, Gpt 5 Codex or Gpt 3 5 Turbo Instruct?
Gpt 5 Codex costs $1.25/M input; Gpt 3 5 Turbo Instruct costs $1.5/M input. Price spread matters at billion-token scale.
Gateway catalog snapshot.
Gpt 5 Codex is cheaper at $1.25/M input vs $1.5/M input for Gpt 3 5 Turbo Instruct. 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 5 Codex vs Gpt 3 5 Turbo Instruct. Price, context, routing
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AnswersSelf-contained
How do Gpt 5 Codex and Gpt 3 5 Turbo Instruct context windows compare?
Gpt 5 Codex: 400,000 tokens. Gpt 3 5 Turbo Instruct: 8,192 tokens.
01Deep dive
Comparison summary
Gpt 5 Codex is cheaper at $1.25/M input vs $1.5/M input for Gpt 3 5 Turbo Instruct. Compare context, hosts, and o10 routing bands.
Gpt 5 Codex is cheaper at $1.25/M input vs $1.5/M input for Gpt 3 5 Turbo Instruct. Compare context, hosts, and o10 routing bands.
SourceMethodology
o10 gateway + fulfillment catalog snapshot.
FAQFrequently asked questions
Common questions
Which is cheaper, Gpt 5 Codex or Gpt 3 5 Turbo Instruct?
Gpt 5 Codex at $1.25/M input vs $1.5/M for Gpt 3 5 Turbo Instruct.
Can you run both on the same hosts?
Gpt 5 Codex: OpenAI. Gpt 3 5 Turbo Instruct: OpenAI.