GPT-5.5
OpenAI's latest agentic flagship for coding, research, computer-use workflows, and long multi-step knowledge work.
The gold standard for autonomous AI research — if you can afford to run it.
Conducting exhaustive, multi-source research that would take a human analyst hours to compile manually.
You need quick answers, have a tight budget, or are working on tasks outside of research, analysis, or long-form synthesis.
Deep Research mode involves agentic tool calls and web browsing, which can multiply effective token costs significantly. Pricing is per token but real-world research sessions often consume large amounts of both. Available via ChatGPT Plus/Pro and API; API access may require higher usage tiers.
Autonomous web browsing and source synthesis far beyond standard chat models
Deep multi-step reasoning enables it to resolve contradictions across sources and form defensible conclusions
200K context window handles lengthy documents and research threads without truncation
Produces structured, citation-backed reports suitable for professional use
Extremely expensive at $10/$40 per million tokens — a lengthy research session can cost tens of dollars
Deliberate, slow execution makes it unsuitable for real-time or interactive use cases
No image generation; limited utility for creative or casual tasks
What people actually use OpenAI: o3 Deep Research for.
Compiling a 20-source competitive landscape report on the EV battery supply chain with cited findings
Synthesizing contradictory clinical trial results across multiple studies to assess drug efficacy evidence
Researching regulatory environments across 10 jurisdictions for a market-entry strategy document
Price History
→0% since May 9
48 data points · tracked daily since May 9, 2026
Conducting exhaustive, multi-source research that would take a human analyst hours to compile manually.. Start free — no card required.
Recommendations are made independently based on real-world use and public benchmarks. See our disclosures for details.
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Pricing moves, ranking shifts, and capability updates.
OpenAI: o3 Deep Research (OpenAI) is now indexed. The gold standard for autonomous AI research — if you can afford to run it.
View modelOpenAI: o3 Deep Research is best for conducting exhaustive, multi-source research that would take a human analyst hours to compile manually.. It is a strong fit when that workflow matters more than the tradeoffs around premium pricing and deliberate speed.
You need quick answers, have a tight budget, or are working on tasks outside of research, analysis, or long-form synthesis.
Google: Gemma 2 9B is the lower-cost option to compare first when you want a similar workflow fit with less token spend.
GPT-5.5 is the better pick when response time matters more than maximum depth or premium quality.
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