fix(pricing): add supports_web_search for OpenAI gpt-5.1/5.2/5.3 chat models

[yudelevi]

Relevant issues

Pre-Submission checklist

• I have Added testing in the tests/test_litellm/ directory — N/A, JSON-only data fix
• My PR passes all unit tests on make test-unit
• My PR's scope is as isolated as possible, it only solves 1 specific problem

Type

🐛 Bug Fix

Changes

OpenAI gpt-5.1, gpt-5.2, and gpt-5.3 chat models all support the web_search_options parameter (docs), but the model cost registry was missing the supports_web_search flag. Only gpt-5.2-pro had it set correctly.

Models updated (OpenAI provider only):

• gpt-5.1, gpt-5.1-2025-11-13, gpt-5.1-chat-latest
• gpt-5.2, gpt-5.2-2025-12-11, gpt-5.2-chat-latest
• gpt-5.3-chat-latest

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Project	Deployment	Actions	Updated (UTC)
litellm	Ready	Preview, Comment	Mar 5, 2026 10:43pm

[greptile-apps]

Greptile Summary

This PR is a targeted data-only fix that adds "supports_web_search": true to seven OpenAI gpt-5.1, gpt-5.2, and gpt-5.3 chat-mode model entries in model_prices_and_context_window.json. This is the correct approach per the project's convention of keeping capability flags in the registry rather than hardcoding them, and the change is non-breaking.

• All 7 targeted models (gpt-5.1, gpt-5.1-2025-11-13, gpt-5.1-chat-latest, gpt-5.2, gpt-5.2-2025-12-11, gpt-5.2-chat-latest, gpt-5.3-chat-latest) have been correctly updated.
• JSON syntax and property ordering is consistent with the surrounding entries.
• The two gpt-5.4 model entries (gpt-5.4 and gpt-5.4-2026-03-05) also list /v1/chat/completions in their supported_endpoints but are not updated — they carry mode: "responses" which aligns with the PR's stated scope of "chat models", though it may be worth confirming whether web_search_options is supported there too.

Confidence Score: 4/5

• This PR is safe to merge — it is a JSON-only data fix with no logic changes and no breaking impact.
• The change is isolated to a single data file, adds a capability flag to models that already existed in the registry, follows the established pattern used by gpt-5.2-pro, and is non-breaking. Score is 4 rather than 5 only because gpt-5.4/gpt-5.4-2026-03-05 may also need the flag and weren't addressed, leaving a small potential gap.
• No files require special attention; the single changed file (model_prices_and_context_window.json) is straightforward.

Important Files Changed

Filename	Overview
model_prices_and_context_window.json	Adds supports_web_search: true to 7 OpenAI gpt-5.1/5.2/5.3 chat-mode models; note that gpt-5.4 and gpt-5.4-2026-03-05 (which also list /v1/chat/completions in supported_endpoints) are not updated

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[model_prices_and_context_window.json] --> B[gpt-5.1]
    A --> C[gpt-5.1-2025-11-13]
    A --> D[gpt-5.1-chat-latest]
    A --> E[gpt-5.2]
    A --> F[gpt-5.2-2025-12-11]
    A --> G[gpt-5.2-chat-latest]
    A --> H[gpt-5.3-chat-latest]
    A --> I[gpt-5.2-pro / gpt-5.2-pro-2025-12-11]
    A --> J[gpt-5.4 / gpt-5.4-2026-03-05]

    B -- "supports_web_search: true ✅ ADDED" --> K[web_search_options supported]
    C -- "supports_web_search: true ✅ ADDED" --> K
    D -- "supports_web_search: true ✅ ADDED" --> K
    E -- "supports_web_search: true ✅ ADDED" --> K
    F -- "supports_web_search: true ✅ ADDED" --> K
    G -- "supports_web_search: true ✅ ADDED" --> K
    H -- "supports_web_search: true ✅ ADDED" --> K
    I -- "supports_web_search: true ✅ Already set" --> K
    J -- "supports_web_search: ❓ Not updated" --> L[Flag potentially missing]

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Comments Outside Diff (1)

1. model_prices_and_context_window.json, line 20863 (link)

   gpt-5.4 / gpt-5.4-2026-03-05 may be missing supports_web_search

   Both gpt-5.4 (line 20863) and gpt-5.4-2026-03-05 (line 20899) end their property lists without supports_web_search, even though both declare /v1/chat/completions in their supported_endpoints. If these models support web_search_options via the chat completions path (consistent with gpt-5.1/5.2/5.3 receiving the flag here), they would need the same addition.

   This PR is intentionally scoped to "chat mode" models (mode: "chat"), and both gpt-5.4 entries carry mode: "responses" — so the omission may be deliberate. It is worth confirming whether web_search_options is also available for these two models when called via /v1/chat/completions, and if so, adding the flag in a follow-up.

_{Last reviewed commit: 9bbe15f}