OpenAI Codex, specifically the gpt-5.3-codex model, is priced at $1.75 per 1M input tokens. Financial viability depends on measuring this metered input cost against the time saved by developers during code generation and review.
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OpenAI Codex (gpt-5.3-codex) costs $1.75 per 1M input tokens. This usage-based model marks a shift from flat-rate subscriptions to metered units, requiring engineering and finance teams to track API consumption alongside developer output.
For CTOs, the primary challenge is no longer fixed seat costs but the variable expense of context-heavy requests. Monitoring these input volumes is essential to ensure that AI-assisted development remains a cost-effective alternative to manual coding.
| Model / rate | Price | Unit |
|---|---|---|
| gpt-5.3-codex — Codex Standard Input | $1.75 | per 1M input tokens |
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The pricing for gpt-5.3-codex is based entirely on the volume of information sent to the model. At $1.75 per 1M input tokens, the total cost is determined by the size of the codebase, documentation, and prompts your team provides as context. This makes large-scale refactoring or automated code reviews more expensive than simple script generation.
As AI transitions from a general chatbot to a dedicated coworker, the cost structure moves toward metered agents. This shift requires a change in procurement strategy. Instead of approving a static license fee, Finance must now manage a variable operational expense where the value is only realized if the input costs result in a significant reduction in engineering hours.
To determine if this spend pays back, you must bridge the gap between metered API costs and engineering velocity. NetLift allows you to measure the $1.75 per 1M token input cost against a verified baseline of developer productivity. By quantifying the time saved per pull request, you can confirm whether the adoption of gpt-5.3-codex provides a genuine net return or simply adds to your operational overhead.
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All pricing on this page comes from official vendor pages:
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About the author
Paige Gilmore · Founder, NetLift
Paige Gilmore is the founder of NetLift, the AI Value Management platform that helps organisations measure the cost, savings and return of AI adoption.
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