GPT-5.1
Flagship model for coding, reasoning, and agentic tasks with adjustable reasoning depth and multimodal input/output.
GPT-5.1 at a glance
Context window
400K tokens
Input price
$1.25
per 1M tokens
Output price
$10
per 1M tokens
Why use GPT-5.1
Strengths, benchmarks, and where GPT-5.1 fits in your team's workflow.
1. Configurable Reasoning for Agentic Tasks
- Built to excel in autonomous or semi-autonomous coding workflows, with adjustable reasoning effort for planning, refactoring and debugging.
2. Fast Multi-Modal Input with Large Output
- Accepts both text and image inputs while producing text outputs.
- Offers up to 128 k output tokens, allowing long responses and code generation across multiple files.
3. Large Context & Knowledge Cut-Off
- 400 k token context window supports processing large codebases or documents.
- Knowledge cut-off of Sep 30 2024 ensures familiarity with recent tools and frameworks.
4. Reasoning Token Support
- Provides explicit support for reasoning tokens, enabling developers to fine-tune the balance between reasoning depth and speed.
Power your team with GPT-5.1
Appaca is the AI workspace for operators. Build internal tools and AI co-workers powered by GPT-5.1 - connected to your real data and ready for your whole team. No code, no deployment.
Build internal AI tools
Describe what you need and the Appaca agent builds it - lead scorers, report generators, email drafters - with GPT-5.1 as the engine. No code, no deployment.
Give GPT-5.1 your real data
Connect the tools your team already uses - Slack, Notion, Google Sheets, Airtable, and more - so GPT-5.1 works with real context, not generic answers.
Automate recurring tasks
Schedule GPT-5.1 to run on autopilot - daily digests, weekly summaries, or real-time triggers - all managed inside your Appaca workspace.
Describe it, and it's built
Tell the Appaca agent what your team needs and it builds a working app powered by GPT-5.1 - connected to the tools you already use.
Where teams use GPT-5.1
See how teams put GPT-5.1 to work inside Appaca - internal tools and AI agents that work around you.
Sales
Score leads, draft follow-ups, and summarise deals with GPT-5.1 doing the heavy lifting.
Explore Appaca for SalesMarketing
Draft, repurpose, and report on campaigns in your brand voice - powered by GPT-5.1.
Explore Appaca for MarketingOperations
Automate reporting, vendor tracking, and process docs with AI built around your workflow.
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Build internal AI tools with GPT-5.1
Describe the tool your team needs and get a working app powered by GPT-5.1 - with a built-in database, team access, and integrations. No code, no deployment.