{ "model_name": "GPT-5.5", "model_organization": "OpenAI", "submitting_organization": "Sierra", "submission_date": "2026-05-05", "submission_type": "standard", "modality": "text", "contact_info": { "email": "ben.s@sierra.ai", "name": "Sierra Research Team" }, "results": { "airline": null, "retail": null, "telecom": null, "banking_knowledge": { "pass_1": 44.58762886597938, "pass_2": 37.62886597938145, "pass_3": 33.24742268041237, "pass_4": 29.896907216494846, "cost": null, "retrieval_config": "alltools" } }, "is_new": true, "trajectories_available": true, "trajectory_files": { "banking_knowledge": "banking_knowledge_results.json" }, "references": [], "reasoning_effort": "xhigh", "methodology": { "evaluation_date": "2026-07-22", "tau2_bench_version": "1.0.1", "user_simulator": "gpt-5.2", "notes": "Banking_knowledge evaluation with AllTools retrieval, GPT-5.2 low-reasoning user simulation, four trials, and seed 300.", "verification": { "modified_prompts": false, "omitted_questions": false } }, "model_release": { "release_date": "2026-04-23", "announcement_url": "https://openai.com/index/introducing-gpt-5-5/", "announcement_title": "Introducing GPT-5.5" } }