Add per-token logprobs content schema to LogprobsPart

[TechnoFinch]

Summary

• Adds LogprobsToken and LogprobsTokenTopLogprob schema types to describe the per-token logprobs structure the API already returns
• Adds content field to LogprobsPart referencing the new types
• All fields optional for backwards compatibility

Problem

The chat completions API returns logprobs in a content array with nested top_logprobs per token, but the OpenAPI spec only describes the legacy flat format (tokens, token_logprobs, token_ids). This causes the Stainless-generated Python SDK to silently drop content and per-token top_logprobs during deserialization. This brings back lost functionality from 1.x.x to 2.x.x.

Verification

Confirmed via raw curl that the API returns the content[].top_logprobs[] structure. The spec change matches the actual response format exactly.

Fixes https://linear.app/together-ai/issue/ENG-86462/fix-logprob-misalignment-with-open-sdk

[github-actions]

✱ Stainless preview builds

This PR will update the togetherai SDKs with the following commit messages.

go

feat(api): add content field and nested logprob models to LogProbs

openapi

feat(api): add content field and token types to LogprobsPart model

python

feat(api): add content field and nested models to LogProbs

terraform

chore(internal): regenerate SDK with no functional changes

typescript

feat(api): add content field to LogProbs in completions

Edit this comment to update them. They will appear in their respective SDK's changelogs.

✅ togetherai-python studio · code · diff

Your SDK build had at least one "warning" diagnostic, but this did not represent a regression.
generate ⚠️ → build ✅ → lint ✅ → test ⏭️

pip install https://pkg.stainless.com/s/togetherai-python/509d79c92b5760e68b8b528bd6f935cb11fdc854/together-2.9.0-py3-none-any.whl

✅ togetherai-openapi studio · code · diff

Your SDK build had at least one "note" diagnostic, but this did not represent a regression.
generate ✅

✅ togetherai-typescript studio · code · diff

Your SDK build had at least one "warning" diagnostic, but this did not represent a regression.
generate ⚠️ → build ✅ (prev: build ⏭️) → lint ✅ (prev: lint ⏭️) → test ❗

npm install https://pkg.stainless.com/s/togetherai-typescript/3e3bd06836c167f5b6b073566d7b24b483a2bd01/dist.tar.gz

✅ togetherai-go studio · code · diff

Your SDK build had at least one "note" diagnostic, but this did not represent a regression.
generate ✅ → build ✅ (prev: build ⏭️) → lint ✅ → test ❗

go get github.com/stainless-sdks/togetherai-go@c718a0e994b9c3119d50537748c327f138a80428

✅ togetherai-terraform studio · code · diff

Your SDK build had at least one "note" diagnostic, but this did not represent a regression.
generate ✅ → lint ✅ → test ✅

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Last updated: 2026-04-22 01:25:59 UTC