Mistral AI Patents LLM Tool Call Execution via Code Blocks
Original: Mistral Patent for “Code implemented tool calls”
Why This Matters
Patenting LLM tool-call orchestration may shape how AI agents interact with external systems across the industry.
Mistral AI has been granted US Patent 12,670,045 B1 for 'Code Implemented Tool Calls,' covering a method where an LLM generates a sandboxed code block to encapsulate and execute tool calls, filed March 4, 2026, and granted June 30, 2026.
The USPTO granted Mistral AI (Paris, France) patent US 12,670,045 B1 on June 30, 2026, for a technique called 'Code Implemented Tool Calls.' The invention, credited to inventor Gabriel Vergnaud, was filed on March 4, 2026 under application No. 19/557,103. The patented method describes a server-side process in which a large language model (LLM) generates a code block in a programming language to encapsulate one or more tool calls requested by a user. The code block is executed within a sandbox environment. If a pending tool call is encountered during execution, the server pauses the code block, transmits the pending call to a client for execution, receives the result, and then resumes execution by substituting that result back into the code block. The final output is returned to the LLM. The patent covers 20 claims and is classified under International Patent Class G06F 9/54 (interprocess communication) and CPC G06F 9/547. This approach formalizes a structured, pausable execution model for LLM-driven tool use within sandboxed environments.