What's Changed

• chore(deps): bump pydantic from 2.11.7 to 2.11.9 by @dependabot[bot] in #1343
• fix(prompt-placeholders): don't strip tool calls from placeholder messages by @nimarb in #1346
• chore(deps-dev): bump pytest from 8.4.1 to 8.4.2 by @dependabot[bot] in #1322
• chore(typo): fix minor typos in langfuse client comments by @jitokim in #1350
• feat: support custom export path to export spans by @yash025 in #1342
• chore: test to validate multiple calls to update_trace don't drop att… by @nimarb in #1369
• feat(api): update API spec from langfuse/langfuse a7d59d7b by @langfuse-bot in #1371
• feat(openai): add openai embeddings api support (#1345) by @minimAluminiumalism in #1372

New Contributors

• @jitokim made their first contribution in #1350
• @yash025 made their first contribution in #1342
• @minimAluminiumalism made their first contribution in #1372
• @langfuse-bot made their first contribution in #1371

Full Changelog: v3.4.0...v3.5.0

What's Changed

• feat(experiments): add experiment runner by @hassiebp in #1334

Full Changelog: v3.3.5...v3.4.0

What's Changed

• fix(langchain): set cost to zero on errors by @hassiebp in #1328
• fix(client): pass env var tracing environment to resource manager by @hassiebp in #1331
• fix(openai): handle None arguments in tool calls by @Zentorno in #1339
• fix(get_client): preserve properties on client such as environment by @nimarb in #1341
• chore(deps-dev): bump langgraph from 0.6.6 to 0.6.7 by @dependabot[bot] in #1327
• fix(prompt-folders): update prompt in folder failed with wrong encoding by @aaguirre-rdit in #1335

New Contributors

• @Zentorno made their first contribution in #1339
• @aaguirre-rdit made their first contribution in #1335

Full Changelog: v3.3.4...v3.3.5

What's Changed

• add prompt cache invalidation functionality by @cemasma in #1278
• feat(client): add optional override default cache ttl capability for prompt caching by @cemasma in #1249
• fix(langchain): parse tool_calls from AIMessage by @hassiebp in #1316
• fix(openai): openrouter non-streamed cost tracking by @hassiebp in #1319

New Contributors

• @cemasma made their first contribution in #1278

Full Changelog: v3.3.3...v3.3.4

What's Changed

• chore(deps-dev): bump ruff from 0.12.10 to 0.12.11 by @dependabot[bot] in #1315
• fix(langchain): token detach exceptions in async contexts by @hassiebp in #1317

Full Changelog: v3.3.2...v3.3.3

What's Changed

• feat(langchain): set callback spans to active in OTEL context by @hassiebp in #1310
• fix: add support for capturing usage details with ChatBedRock by @pbvignesh in #1267
• feat(openai): add openrouter cost tracking by @hassiebp in #1311
• fix(langchain): do not end span on agent callbacks by @qnnn and @hassiebp in #1312
• fix: resolve GCS bad request error in media uploads. by @Jay-flow in #1265
• fix(span): fallback to client environment if not provided by @Digma in #1304

New Contributors

• @pbvignesh made their first contribution in #1267
• @Jay-flow made their first contribution in #1265
• @Digma made their first contribution in #1304
• @qnnn made their first contribution in #1312

Full Changelog: v3.3.1...v3.3.2

Full Changelog: v3.3.1...v3.3.1

What's Changed

• feat(traces): add more observation types by @nimarb in #1290
• chore: update default value docs for FLUSH_AT and FLUSH_INTERVAL by @qnnn in #1306
• fix(langchain): capture usage on streamed gemini responses by @hassiebp in #1309

New Contributors

• @qnnn made their first contribution in #1306

Full Changelog: v3.3.0...v3.3.1

What's Changed

• feat(langchain): add update_trace argument by @hassiebp in #1302

Full Changelog: v3.2.8...v3.3.0

What's Changed

• fix(openai): handle async response api input and outputs by @hassiebp in #1301

Full Changelog: v3.2.7...v3.2.8

What's Changed

• fix(langchain): take only int values in parsed usage by @hassiebp in #1299

Full Changelog: v3.2.6...v3.2.7