GPT-Realtime-2.1OpenAI
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HeadroomGarm Tech
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Related Products
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About
GPT-Realtime-2.1 is OpenAI’s reasoning model with tool use for low-latency voice agents and complex speech-to-speech workflows. It updates GPT-Realtime-2 with improved alphanumeric recognition, silence and noise handling, and interruption behavior, helping applications understand spoken code, manage imperfect audio, and respond more naturally when users pause or talk over the agent. Developers can configure reasoning effort to balance deeper thinking against latency and output usage, while strong instruction following helps the model stay aligned with a defined role, tone, and workflow. It accepts and produces both audio and text, can take images as input, and supports function calling so an agent can retrieve information or perform actions during a conversation. The model has a 128,000-token context window, supports up to 32,000 output tokens, and includes reasoning-token support for extended interactions.
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About
Headroom is a menu bar app for macOS, Windows and Linux that cuts Claude Code and ChatGPT Codex token costs by ~50%, which can translate to up to 2x as much usage on the plan you already pay for.
It compresses the bulky tool output, logs and boilerplate your coding agent sends. Compression runs locally, before the request leaves your machine, so prompts and code stay private. Source code passes through untouched, and the originals stay available to the agent through a retrieval tool.
Typical coding sessions save 25-50% overall. Across 183 Claude Code users over one week, Headroom cut input tokens by 34% (measured) and output tokens by 33% (estimated).
Also included: a dashboard and activity feed with tokens and API-equivalent dollars saved, project learnings that turn past sessions into token-saving rules, and one-click add-ons (MarkItDown, Serena, Codebase Memory, Context7, Ponytail, Caveman).
7-day free trial, no credit card. Plans from $3/month.
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Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Platforms Supported
Windows
Supported
Mac
Supported
Linux
Supported
Cloud
Not Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Audience
Developers, AI agent builders, voice AI teams, contact center platforms, customer support teams, product teams, enterprise automation teams, and conversational AI companies that need realtime speech-to-speech interactions, audio input and output, function calling, tool use, configurable reasoning, image input, long-context voice workflows, transcription, translation, and interactive AI assistants
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Audience
Developers and engineering teams using Claude Code, ChatGPT Codex, or compatible local coding-agent workflows.
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Supported
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API
Offers API
Not Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
$0.40 per cached input
Free Version
Not Supported
Free Trial
Supported
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Pricing
$3/month
Pro is $3/month, billed annually ($36/year), or $4/month, billed monthly, for Claude Pro or ChatGPT Plus. Max x5 is $15/month, billed annually, or $20/month, billed monthly; Max x20 is $30/month, billed annually, or $40/month, billed monthly. Each plan includes a 7-day free trial with no credit card required. Team and Enterprise plans have custom pricing. A separate free, self-managed Headroom CLI is also available.
Free Version
Not Supported
Free Trial
Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Company InformationOpenAI
Founded: 2015
United States
developers.openai.com/api/docs/models/gpt-realtime-2.1
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Company InformationGarm Tech
Founded: 2026
Netherlands
extraheadroom.com
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Alternatives |
Alternatives |
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Categories |
Categories |
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Integrations
Claude Code
Not Supported
Grok Build
Not Supported
Model Context Protocol (MCP)
Not Supported
OpenAI
Supported
OpenAI Codex
Not Supported
OpenCode
Not Supported
Visual Studio Code
Not Supported
gpt-realtime
Supported
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Integrations
Claude Code
Supported
Grok Build
Supported
Model Context Protocol (MCP)
Supported
OpenAI
Not Supported
OpenAI Codex
Supported
OpenCode
Supported
Visual Studio Code
Supported
gpt-realtime
Not Supported
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