A reliable mid-tier upgrade over GPT-4o for instruction-heavy tasks, but the context window and output pricing limit its value against Sonnet-class competitors.
Teams and developers who need GPT-4o-level quality with incremental improvements in accuracy and instruction adherence without paying flagship model prices.
Stronger instruction-following than GPT-4o, reducing prompt engineering overhead
Solid coding performance across Python, JavaScript, and SQL at a mid-tier cost
Good balance of response quality and speed for production API integrations
Improved factual accuracy and reduced hallucination rate compared to GPT-4o
128K context window falls short of Gemini 3.1 Pro's 1M+ and Claude Sonnet 4.6's 200K offerings
See what OpenAI: GPT-5.1 Chat actually costs at your usage level
Based on OpenAI: GPT-5.1 Chat API pricing: $1.25/1M input · $10/1M output. Real costs vary by provider discounts and caching. Check the provider for exact current rates.
Price History
→0% since May 9
4 data points · tracked daily since May 9, 2026
Teams and developers who need GPT-4o-level quality with incremental improvements in accuracy and instruction adherence without paying flagship model prices.. Start free — no card required.
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OpenAI: GPT-5.1 Chat (OpenAI) is now indexed. It supersedes GPT-4o. A reliable mid-tier upgrade over GPT-4o for instruction-heavy tasks, but the context window and output pricing limit its value against Sonnet-class competitors.
View modelOpenAI: GPT-5.1 Chat is best for teams and developers who need gpt-4o-level quality with incremental improvements in accuracy and instruction adherence without paying flagship model prices.. It is a strong fit when that workflow matters more than the tradeoffs around balanced pricing and balanced speed.
You need to process documents or codebases longer than 128K tokens, require native image generation, or are cost-sensitive enough that a sub-$1 input model like GPT-4o Mini would suffice.
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-5.4 is the better pick when response time matters more than maximum depth or premium quality.
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You need to process documents or codebases longer than 128K tokens, require native image generation, or are cost-sensitive enough that a sub-$1 input model like GPT-4o Mini would suffice.
No native image generation capability, limiting true multimodal workflows
Output cost of $10/1M tokens is steep relative to Claude Sonnet 4.6 at similar quality tiers
OpenAI's latest agentic flagship for coding, research, computer-use workflows, and long multi-step knowledge work.
GPT-4 is OpenAI's original flagship large language model, released in March 2023, offering strong reasoning and instruction-following across text tasks. It represents the foundational GPT-4 release before later variants like GPT-4 Turbo or GPT-4o improved speed, cost, and context length.
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