At a Glance
| Vendor | OpenAI |
| Family | GPT-5 series |
| Launched | OpenAI announced GPT-5.5 on April 23, 2026, six weeks after GPT-5.4. The release lands as the workhorse model for long-running agentic tasks, with GPT-5.5 Pro added as the deeper-reasoning variant. |
| Context window | 256,000 tokens standard. GPT-5.5 Pro extends to long-context configurations on enterprise tiers. |
| Pricing | GPT-5.5 prices roughly 20% higher per-token than GPT-5.4 but uses 40% fewer tokens on equivalent tasks, net cheaper in production. GPT-5.5 Pro carries premium pricing reflecting reasoning-trace compute. Both available across ChatGPT consumer tiers, OpenAI API, and Azure OpenAI. |
| Access channels | OpenAI API (gpt-5.5, gpt-5.5-pro), ChatGPT all paid tiers (Plus, Pro $100/mo, Business, Enterprise), Microsoft Copilot via Azure OpenAI, Codex with Computer Use rollout. |
Notable Benchmarks
TerminalBench 82.7%, GPDval 84%. The headline jumps are on long-running agentic tasks (multi-hour autonomous coding, computer-use, deep research) rather than single-turn quality. GPT-5.5 Pro pushes further on competition math and GPQA.
Strengths
Token efficiency (40% reduction on typical workloads), best-in-class for long-running agentic tasks, deep ChatGPT and Copilot deployment surface, fast inference relative to Pro variant. Default choice for most production OpenAI applications post-April 2026.
Limitations
Not a step change on single-turn quality versus GPT-5.4. Pro variant is meaningfully slower and pricier. Token-efficiency gains require updated tokenization assumptions in downstream cost modeling.
Brand-Visibility Implications
GPT-5.5 is the model that powers ChatGPT, Microsoft Copilot, and the Codex Computer Use rollout, the three highest-volume brand-visibility surfaces in 2026. Training cutoff and tokenization changes mean any brand baseline established on GPT-5.4 is stale and needs re-baselining. Brands appearing strongly on GPT-5.4 may have lost ground if their post-cutoff coverage was thin. See full GPT-5.5 brand visibility implications and ChatGPT visibility.
How Presenc AI Tracks This Model
Presenc AI monitors brand visibility on OpenAI's GPT-5 series as part of continuous multi-platform AI visibility tracking. We sample OpenAI GPT-5.5 across representative prompt sets daily, compare against competitor performance on the same prompts, and flag material mention-rate changes so brand teams can respond quickly when AI representation shifts.