Sep 11, 2026 feature
Unified sidebar search and saved views for better filter management Users can now access a consolidated search and saved views interface, improving workflow efficiency when managing filters.
Evidence + feat(filters): unify sidebar search and saved views
github.com
Sep 9, 2026 other
Improved ClickHouse memory limit error classification Memory limit errors from ClickHouse are now properly classified as ClickHouseResourceError for better error handling.
Evidence + fix(clickhouse): classify memory limit variants as ClickHouseResourceError
github.com
Sep 3, 2026 deprecation
Gemini 3 Pro/3.1 Flash-Lite preview models flagged for shutdown Users relying on Gemini 3 Pro and 3.1 Flash-Lite preview models will need to migrate to alternative models as these are being deprecated.
Evidence + chore(pricing): flag shut-down Gemini 3 Pro/3.1 Flash-Lite previews, refresh audit snapshot
github.com
Sep 2, 2026 other high
Security fix: JWT session max age reduced to 14 days All users will have sessions automatically expire after 14 days instead of previous default, requiring re-authentication for longer-lived sessions.
Evidence + security(auth)!: reduce default JWT session max age to 14 days
github.com
Aug 26, 2026 feature
OIDC profile can now be read from the userinfo endpoint Users with custom OIDC configurations can have their profile information automatically read from the userinfo endpoint, improving authentication flexibility.
Evidence + feat(auth): read custom OIDC profile from the userinfo endpoint
github.com
Aug 26, 2026 other
Fixed surrogate pair splitting in truncate() function Text truncation now correctly preserves Unicode surrogate pairs, preventing character corruption when truncating strings with emoji or other multi-byte characters.
Evidence + fix(shared): truncate() no longer splits surrogate pairs
github.com
Aug 25, 2026 api
Add model definition upsert endpoint to API Developers can now use a new API endpoint to upsert model definitions, improving model management capabilities.
Evidence + feat(api): add model definition upsert endpoint by @hassiebp in #16516
github.com
Aug 17, 2026 deprecation high
API v3 sunset date announced for November 16, 2026 Users of Langfuse API v3 need to plan migration to v4 before November 16, 2026 as v3 will be sunset on that date.
Evidence + feat(api): state the concrete v3 sunset date, November 16, 2026 (LFE-10895)
github.com
Aug 11, 2026 feature
OpenAI Responses API request input now renders in trace chat view Users can now see OpenAI Responses API request details in the trace chat view, improving debugging and monitoring capabilities.
Evidence + fix(chatml): render OpenAI Responses API request input in trace chat view
github.com · also seen at 1 more source
Aug 10, 2026 positioning
Renamed 'Monitors and Alerts' feature to 'Alerts' across all pricing tiers Users and customers will see the feature referred to as 'Alerts' instead of 'Monitors and Alerts', potentially affecting how they understand the feature offering and documentation references.
Evidence − Monitors and Alerts
2 monitors
Monitors and Alerts
20 monitors
Monitors and Alerts
50 monitors
Monitors and Alerts
100 monitors
+ Alerts
2 alerts
Alerts
20 alerts
Alerts
50 alerts
Alerts
100 alerts
langfuse.com
Aug 5, 2026 other
Fix unicode escaping in client-side trace downloads and copies Users can now correctly download and copy traces with unicode characters without escape sequence corruption.
Evidence + fix(trace): decode unicode escapes in client-side trace downloads and copies
github.com
Aug 3, 2026 pricing
Added GPT-5.6 usage aliases for pricing calculations GPT-5.6 model pricing is now properly configured with usage aliases.
Evidence + fix(pricing): add GPT-5.6 usage aliases
github.com
Jul 29, 2026 api high
Observations API v2 and Metrics API v2 released with improved performance Developers using the API get significantly faster performance with v2 endpoints; migration from v1 recommended.
Evidence + the significantly faster Observations API v2 and Metrics API v2
github.com
Jul 27, 2026 feature
Performance telemetry added for lazy JSON viewer in trace view Developers will have better observability into trace JSON viewer performance metrics.
Evidence + feat(trace): perf telemetry for the lazy JSON viewer (LFE-14419)
github.com · also seen at 1 more source
Jul 27, 2026 other
Media retention lease renewal during blob cleanup Prevents potential data loss by ensuring blob cleanup operations properly maintain retention leases.
Evidence + fix: renew media retention leases during blob cleanup
github.com
Jul 25, 2026 deprecation high
Superseded Postgres and ClickHouse tables dropped in v4 Users upgrading to v4.0.0 must ensure they have migrated away from legacy table schemas before upgrading, as deprecated tables are removed.
Evidence + feat(v4)!: drop superseded Postgres and ClickHouse tables
github.com
Jul 19, 2026 feature
Added Observations API v2 as a new rate-limited API endpoint across all pricing tiers Developers now have explicit rate limits for the new Observations API v2 (30-1000 requests/min depending on tier), providing clarity on API usage constraints for this new endpoint.
Evidence − Rate limit (general API routes)
Rate limit (datasets api)
Rate limit (legacy Metrics API)
+ Rate limit (General API)
Rate limit (Datasets API)
Rate limit (Observations API v2)
Rate limit (Legacy Metrics API)
langfuse.com · also seen at 1 more source