Model comparison

GPT-5.1 vs GPT-5.2 Codex

Compare GPT-5.1 (OpenAI) and GPT-5.2 Codex (OpenAI) by price, context, capabilities, and latency.

Which should you pick?

Price: GPT-5.1 is cheaper ($1.25 / 1M tokens input / $10 / 1M tokens output) vs GPT-5.2 Codex ($1.75 / 1M tokens input / $14 / 1M tokens output).

Side by side

GPT-5.1 vs GPT-5.2 Codex — full comparison

Compare price, provider, context, capabilities, latency, and source basis.

Model	Provider	Input	Output	Context	Capabilities	Best for	Latency	Status	Source
GPT-5.1openai/gpt-5.1	OpenAI	$1.25 / 1M tokens	$10 / 1M tokens	400k	StreamingTool callingJSON modeVision	image understanding, multimodal chat	2079-3635ms	Catalog	Platform curated
GPT-5.2 Codexopenai/gpt-5.2-codex	OpenAI	$1.75 / 1M tokens	$14 / 1M tokens	400k	StreamingTool callingJSON modeVision	image understanding, multimodal chat	2227-3996ms	Catalog	Platform curated

FAQ

GPT-5.1 vs GPT-5.2 Codex FAQ

Is GPT-5.1 or GPT-5.2 Codex cheaper?

GPT-5.1 is cheaper ($1.25 / 1M tokens input / $10 / 1M tokens output) vs GPT-5.2 Codex ($1.75 / 1M tokens input / $14 / 1M tokens output). Actual cost depends on your input/output token mix — estimate it with the pricing calculator.

Which has a larger context window, GPT-5.1 or GPT-5.2 Codex?

Both offer the same context window: 400k tokens.

GPT-5.1 vs GPT-5.2 Codex for Vision: which should I pick?

Both target Vision. Pick GPT-5.1 to optimize cost, or GPT-5.1 for the longer context window. Test both on real prompts before committing production traffic.

GPT-5.1 details GPT-5.2 Codex details Pricing calculator OpenAI-compatible quickstart