Glyph Cluster is now available in stealth for free on AI Gateway
By Steven Van ·
Access requires a Pro or Enterprise plan with purchased AI Gateway credits, and prompts and responses may be used for training.
Teams on Pro and Enterprise plans with purchased AI Gateway credits can now use Glyph Cluster through Vercel. The reasoning model is free during its stealth period and supports coding and long-context analysis.
Coding and multi-step reasoning
Glyph Cluster can review code, explain failures, debug issues, propose changes, and reason through implementation options. It also handles planning, synthesis, quantitative reasoning, and comparisons across large inputs. Responses stream as they are generated, and function calling lets agents connect to tools and systems.
Connecting an app or coding agent
Use the model name stealth/glyph-cluster through the AI SDK or the OpenAI-compatible Chat Completions and Responses APIs. For Claude Code, Codex, Cursor, and other coding agents, install the latest Vercel CLI, run vercel ai-gateway setup, then select the model in the agent. AI Gateway requests can authenticate with an API key, as described in the linked API key documentation.
Input and data limits
Glyph Cluster accepts text only, with no image or file input. Tool use is limited to function tools defined by the user, and structured outputs are not supported. Zero Data Retention is unavailable for this model, and prompts and responses may be used for training and model improvement.