GPT-5.5 NEW
GPT-5.5 is OpenAI’s “agent” model: it’s built to take a messy goal, turn it into steps, use tools, and keep iterating until the work is done. It’s most valuable when the task isn’t one prompt → one answer (coding changes, multi-source research, long documents, or workflows that need checking and follow‑ups), and less about casual chat. Expect higher cost and latency than lighter models in exchange for better persistence and tool use. GPT-5.5 是 OpenAI 主打“能把事做完”的 Agent 模型：它更擅长把一个复杂目标拆成步骤， 调用工具/接口，反复检查与迭代，直到交付结果。它在需要多轮推进的工作里更有价值（改代码、 多来源调研、长文档处理、需要自检与回访的流程），而不是单纯闲聊。代价是更高的成本与更慢的 响应，但换来更强的持续执行与工具使用能力。
How are Intelligence, Speed & Cost bucketed?
- Top 1%≤ 1%
- Top 5%≤ 5%
- Top 10%≤ 10%
- Good≤ 25%
- Medium≤ 50%
- Below avg> 50%
- Top 1%≥ 345 tok/s
- Top 5%≥ 237 tok/s
- Top 10%≥ 196 tok/s
- Good≥ 146 tok/s
- Medium≥ 90 tok/s
- Slow< 90 tok/s
- Freeopen weights · self-host
- Low< $1 / M out
- Moderate$1–5 / M out
- High≥ $5 / M out
Why it matters
It’s a step toward “LLM as operator”: planning + tool use + persistence, not just generation quality.
Core Capabilities
Context Window
Availability
Pricing Model
Capability / Performance
Where this model sits relative to the middle 60% of models in the tree. All scores are 0–10 (higher is better).
What it feels like
- Later 2026 GPT-5 refresh — incremental quality bump over 5.2.
- Pro variant hits 93.2% on GPQA Diamond and 40.3% on FrontierMath Tier 1-3 — new state-of-the-art on hard math/science
- 400K-token context window — biggest OpenAI window yet, designed for long-running agents
- GDPval state-of-the-art — outperforms industry professionals on well-specified tasks across 44 occupations
Best use cases
- Hardest math/science research where Pro/Thinking modes pull ahead of every competitor
- Long-running professional agent workflows (400K context + GDPval-leading task quality)
- Knowledge work spanning 44 occupations — spreadsheets, presentations, multi-step projects
Tools to try
Not ideal for
- Casual chat or creative writing — Instant tier feels muted compared to GPT-5.1
- Cost-sensitive bulk inference — 40% price hike vs 5.1 with no automatic upgrade win
Model Evolution
GPT is OpenAI's language model family.