GPT-5.5
OpenAI's stepping revision between GPT-5 and the next generation - better instruction following, same price class as GPT-4o
Context window
128K
Input / 1M tokens
Free
Output / 1M tokens
Free
Provider
OpenAI
Positioned at a similar price point to GPT-4o. GPT-5.5 Pro is a higher-cost tier for enterprise agentic workloads.
GPT-5.5 fills the gap between GPT-4o and GPT-5 in OpenAI's lineup. It offers improved instruction following and stronger long-context behavior at a price point closer to GPT-4o than GPT-5. A GPT-5.5 Pro variant targets higher-stakes production workloads where output consistency across parallel agentic calls is the failure mode.
Strengths
- ✓Improved instruction following over GPT-4o
- ✓Stronger long-context coherence
- ✓Better output consistency for agentic pipelines
- ✓GPT-5.5 Pro tier for reliability-critical workloads
- ✓Easier migration path than jumping from GPT-4o to GPT-5
Best for developers who...
Tools powered by GPT-5.5
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