docs: use the vision guide image in README example

[marcuswood-oai]

Summary

The README vision example points to a Wikimedia thumbnail URL that can fail during the API's image download. Replace it with the National Gallery of Art image already used in the OpenAI vision guide, preserving the current Responses API example and model.

Fixes #2776.

Image provenance

The image UUID a2e6da57-3cd1-4235-b20e-95dcaefed6c8 is listed with openaccess=1 in the National Gallery's official published-image catalog. The Gallery's open-access policy releases these images under CC0 for commercial and non-commercial use. The URL is hosted directly by the Gallery and matches the official OpenAI docs example.

Validation

• Ran the exact updated README URL example against the live Responses API with SDK 3.13.0 and gpt-5.5: status completed, with a description of the seated woman in the portrait.
• git diff --check passed.
• Reviewed the full diff: one image URL replacement in README.md.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-10T20:22:41.712321Z	ca5a57a	PR opened
🔒 Security Review	✅ Completed 2026-09-10T20:24:56.978024Z	ca5a57a	PR opened

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[openai-sdks]

OkTest Summary

✅ 236/236 SDK tests passed in 10.362s for Python SDK PR #3849.

Test results — 42 files

Test	Result	Time
tests/chat-completions-complex-body.test.ts	✅ Passed	191ms
tests/chat-completions-create.test.ts	✅ Passed	176ms
tests/chat-completions-stream.test.ts	✅ Passed	162ms
tests/files-content-binary.test.ts	✅ Passed	179ms
tests/files-create-multipart.test.ts	✅ Passed	162ms
tests/files-list-pagination.test.ts	✅ Passed	169ms
tests/initialize-config.test.ts	✅ Passed	204ms
tests/instance-isolation.test.ts	✅ Passed	170ms
tests/models-list.test.ts	✅ Passed	155ms
tests/responses-background-lifecycle.test.ts	✅ Passed	109ms
tests/responses-body-method-errors.test.ts	✅ Passed	219ms
tests/responses-cancel-timeout.test.ts	✅ Passed	219ms
tests/responses-cancel.test.ts	✅ Passed	160ms
tests/responses-compact-retries.test.ts	✅ Passed	208ms
tests/responses-compact.test.ts	✅ Passed	170ms
tests/responses-create-advanced-stream.test.ts	✅ Passed	133ms
tests/responses-create-advanced.test.ts	✅ Passed	171ms
tests/responses-create-disconnect.test.ts	✅ Passed	1.287s
tests/responses-create-errors.test.ts	✅ Passed	177ms
tests/responses-create-malformed-api-responses.test.ts	✅ Passed	158ms
tests/responses-create-retries.test.ts	✅ Passed	502ms
tests/responses-create-stream-failures.test.ts	✅ Passed	472ms
tests/responses-create-stream-timeout.test.ts	✅ Passed	201ms
tests/responses-create-stream-wire.test.ts	✅ Passed	3.212s
tests/responses-create-stream.test.ts	✅ Passed	98ms
tests/responses-create-terminal-states.test.ts	✅ Passed	165ms
tests/responses-create-timeout.test.ts	✅ Passed	211ms
tests/responses-create.test.ts	✅ Passed	155ms
tests/responses-delete.test.ts	✅ Passed	254ms
tests/responses-input-items-errors.test.ts	✅ Passed	364ms
tests/responses-input-items-list.test.ts	✅ Passed	402ms
tests/responses-input-items-options.test.ts	✅ Passed	356ms
tests/responses-input-tokens-count-timeout.test.ts	✅ Passed	199ms
tests/responses-input-tokens-count.test.ts	✅ Passed	163ms
tests/responses-malformed-inputs.test.ts	✅ Passed	2.343s
tests/responses-not-found-errors.test.ts	✅ Passed	145ms
tests/responses-parse.test.ts	✅ Passed	310ms
tests/responses-retrieve-retries.test.ts	✅ Passed	227ms
tests/responses-retrieve.test.ts	✅ Passed	131ms
tests/responses-stored-method-errors.test.ts	✅ Passed	563ms
tests/retry-behavior.test.ts	✅ Passed	3.027s
tests/sdk-error-shape.test.ts	✅ Passed	381ms

View OkTest run #34525904949

_{SDK merge (e2fe7af679eb) · head (ca5a57ab3d81) · base (7e31f8cb87f4) · OkTest (08ec4299e769)}

[github-actions]

Castiron custom code

✅ No new custom-code files detected.

43 mixed files remain; 0 existing customizations changed.

Compared 7e31f8cb87f4 → ca5a57ab3d81. Generated baselines verified.

43 existing customizations unchanged

• api.md
• scripts/castiron/README.md
• scripts/castiron/custom_code_report.py
• scripts/castiron/test_custom_code_report.py
• src/openai/init.py
• src/openai/_client.py
• src/openai/resources/audio/transcriptions.py
• src/openai/resources/audio/translations.py
• src/openai/resources/beta/agents/sessions/sessions.py
• src/openai/resources/beta/beta.py
• src/openai/resources/beta/responses/responses.py
• src/openai/resources/beta/threads/runs/runs.py
• src/openai/resources/beta/threads/threads.py
• src/openai/resources/chat/completions/completions.py
• src/openai/resources/embeddings.py
• src/openai/resources/files.py
• src/openai/resources/live/forks.py
• src/openai/resources/live/live.py
• src/openai/resources/live/sideband.py
• src/openai/resources/realtime/realtime.py
• src/openai/resources/responses/responses.py
• src/openai/resources/uploads/uploads.py
• src/openai/resources/vector_stores/file_batches.py
• src/openai/resources/vector_stores/files.py
• src/openai/resources/videos.py
• src/openai/resources/webhooks/init.py
• src/openai/resources/webhooks/webhooks.py
• src/openai/types/beta/agent_session_message.py
• src/openai/types/chat/init.py
• src/openai/types/chat/chat_completion_message_tool_call.py
• src/openai/types/fine_tuning/fine_tuning_job_integration.py
• src/openai/types/responses/init.py
• src/openai/types/responses/response.py
• src/openai/types/responses/response_function_web_search.py
• src/openai/types/responses/response_function_web_search_param.py
• src/openai/types/responses/responses_client_event.py
• src/openai/types/responses/responses_client_event_param.py
• src/openai/types/responses/tool.py
• src/openai/types/responses/tool_param.py
• src/openai/types/webhooks/init.py

3 more in the full report.

A changed generated baseline means this report cannot reliably identify which handwritten lines changed.

Inspect the custom-code diff

Download the exact patch produced by this run (requires repository access):

gh run download 34525997532 --repo openai/openai-python \
  --name castiron-custom-code-34525997532-1 --dir /tmp/castiron-custom-code-34525997532-1
git apply --stat /tmp/castiron-custom-code-34525997532-1/custom-code.patch
cat /tmp/castiron-custom-code-34525997532-1/custom-code.patch

Or reproduce it from an SDK checkout containing the vendored reporter:

git fetch --no-tags origin 7e31f8cb87f43568952bb53287e7478d76db9224 ca5a57ab3d81b228f9d79ba6f3d7aaff23b13e16
python3 scripts/castiron/custom_code_report.py report \
  --base 7e31f8cb87f43568952bb53287e7478d76db9224 \
  --head ca5a57ab3d81b228f9d79ba6f3d7aaff23b13e16 --fetch --require-head-hash --public \
  --out /tmp/castiron-custom-code-ca5a57ab3d81
cat /tmp/castiron-custom-code-ca5a57ab3d81/custom-code.patch

This is the current full custom patch for mixed files, not an attribution of only the handwritten lines changed by this PR.

Full report and patch