GPT-5.5
OpenAI's latest agentic flagship for coding, research, computer-use workflows, and long multi-step knowledge work.
A solid, practical upgrade over GPT-4o that hits the sweet spot between capability and cost — but not the best in any single category.
Teams needing reliable, high-quality outputs across coding, writing, and analysis without paying premium GPT-5 prices.
You need the highest-tier reasoning (use o3), low-cost bulk generation (use GPT-4o mini or Claude Haiku), or native image output.
Pricing structure heavily favors input-heavy use cases like RAG and retrieval. The $10/1M output cost makes it expensive for long-form generation at scale. Context window of 400K is competitive but not best-in-class against Gemini 3.1 Pro's 1M+ window.
400K context window handles large codebases, lengthy documents, and multi-document research in a single pass
Strong instruction-following and structured output generation, outperforming GPT-4o on complex multi-step tasks
Asymmetric pricing ($1.25 input vs $10 output) rewards prompt-heavy workflows like RAG and document analysis
Reliable tool use and function calling, making it well-suited for agentic pipelines
Output cost of $10/1M tokens is steep for high-volume generation tasks — Claude Sonnet 4.6 is cheaper for output-heavy workloads
No native image generation; multimodal input only, so it can't compete with Gemini 3.1 Pro on full multimodal output
Not a dedicated reasoning model — falls short of o3 or Gemini 3.1 Pro on deep mathematical or logical benchmarks
What people actually use OpenAI: GPT-5.1 for.
Analyzing a 300-page legal contract and extracting key obligations and risk clauses in a single prompt
Building an agentic coding assistant that iterates on a full repository with tool calls and structured JSON outputs
Synthesizing findings from 20+ research papers loaded into context for a literature review draft
Price History
→0% since May 9
48 data points · tracked daily since May 9, 2026
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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: GPT-5.1 (OpenAI) is now indexed. It supersedes GPT-4o. A solid, practical upgrade over GPT-4o that hits the sweet spot between capability and cost — but not the best in any single category.
View modelOpenAI: GPT-5.1 is best for teams needing reliable, high-quality outputs across coding, writing, and analysis without paying premium gpt-5 prices.. It is a strong fit when that workflow matters more than the tradeoffs around balanced pricing and balanced speed.
You need the highest-tier reasoning (use o3), low-cost bulk generation (use GPT-4o mini or Claude Haiku), or native image output.
Meta: Llama 3.1 8B Instruct 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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