GPT-5 vs GPT-5.5

Pick two tools from the same category to compare side-by-side.

	GPT-5 OpenAI's frontier model; broad capability, strong tool use.	GPT-5.5 OpenAI's flagship frontier model, positioned as a new class of intelligence for coding and professional work.
Category	model	model
Vendor type	commercial	commercial
Pricing	usage	usage
Strengths	+ First-class integration with OpenAI Agents SDK and Codex CLI + Broad ecosystem of tooling and integrations	+ OpenAI's recommended model for complex reasoning and coding + 1M-token context window with up to 128K output tokens + Generally available via the OpenAI API with listed pricing of $5 input / $30 output per million tokens
Tradeoffs	− Lock-in to OpenAI platform features (e.g., Responses API)	− Most expensive tier in OpenAI's lineup; GPT-5.4 is positioned as the more affordable option for similar work − API-only commercial model; no open weights
Used in stacks	0	0