OpenAI launches GPT-5.5 as new flagship for agents
OpenAI released GPT-5.5 as its flagship model for "real work and powering agents," available immediately in ChatGPT and Codex but with delayed API access due to enhanced safety requirements.
Score breakdown
Developers building agentic coding pipelines should weigh GPT-5.5's improved multi-step execution and Codex upgrades against its roughly doubled cost versus GPT-5.4, and plan for delayed API availability before integrating it into production workflows.
- 01GPT-5.5 is OpenAI's new flagship model, positioned for 'real work and powering agents'
- 02Available immediately in ChatGPT and Codex; API access is delayed due to enhanced safety requirements
- 03GPT-5.5 is priced at $5/$30 per million tokens; GPT-5.5 Pro at $30/$180 per million tokens
OpenAI released GPT-5.5, positioning it as its new flagship model for "real work and powering agents." The model is immediately available in ChatGPT and Codex, though API access is delayed due to enhanced safety requirements. Key technical improvements include better token efficiency and support for longer multi-step execution with tool use and self-checking capabilities — features directly relevant to agentic workflows.
Alongside the model launch, OpenAI shipped significant upgrades to Codex, including browser control, document handling, and OS-wide dictation.
Pricing comes in at $5/$30 per million tokens (input/output) for the standard GPT-5.5 tier and $30/$180 per million tokens for GPT-5.5 Pro, approximately double the cost of GPT-5.4. Alongside the model launch, OpenAI shipped significant upgrades to Codex, including browser control, document handling, and OS-wide dictation. Third-party ecosystem support, such as Hermes Agent integration, emerged quickly after launch.
Early community reactions are mixed but lean positive, with users reporting meaningful improvements in coding and long-horizon tasks. However, some benchmarks reflect only incremental gains over prior versions, and hallucination issues have not been fully resolved.
Key facts
- 01GPT-5.5 is OpenAI's new flagship model, positioned for 'real work and powering agents'
- 02Available immediately in ChatGPT and Codex; API access is delayed due to enhanced safety requirements
- 03GPT-5.5 is priced at $5/$30 per million tokens; GPT-5.5 Pro at $30/$180 per million tokens
- 04Pricing is roughly double that of GPT-5.4
- 05Model features improved token efficiency and longer multi-step execution with tool use and self-checking
- 06Codex received upgrades including browser control, document handling, and OS-wide dictation
- 07Early reactions note improvements in coding and long-horizon tasks, but hallucination issues persist