v1.85.0 (2026-04-21)

What's Changed

🚀 Features

• Online evaluation via OpenTelemetry events by @dmontagu in #5125

Full Changelog: v1.84.1...v1.85.0

v1.84.1 (2026-04-17)

What's Changed

🐛 Bug Fixes

• Skip tool hooks for internal output tools by @DouweM in #5128
• Always pass dict-shaped validated args to hooks for single-BaseModel tools by @DouweM in #5137

Full Changelog: v1.84.0...v1.84.1

v1.84.0 (2026-04-16)

What's Changed

🔒 Security

• Fix exponential-time regex in Google FileSearchTool response parsing by @DouweM in #5106. This was first released in yesterday's v1.83.0. The pattern was reachable in principle from Gemini streaming responses but could not be triggered via real Gemini output in testing, so we're treating it as a hardening fix rather than a vulnerability.

🚀 Features

• Add Claude Opus 4.7 support by @dsfaccini in #5118
• Add stateful compaction mode to OpenAICompaction by @DouweM in #5108
• Add OllamaModel subclass and correct Ollama capability flags to fix structured output on Ollama Cloud by @Goldokpa in #4160

🐛 Bug Fixes

• Fix deferred tool search keyword matching by @pandego in #5014
• Fixing parsing openai_logprobs for streamed responses by @iAmir97 in #5091
• fix(openai): handle null text in Responses API output by @DouweM in #5124
• Chain OpenAI Responses retries through concrete openai_previous_response_id seeds by @DouweM in #5126
• fix: exclude resumed requests from new_messages() even with current run_id by @madanlalit in #4731

New Contributors

• @iAmir97 made their first contribution in #5091

Full Changelog: v1.83.0...v1.84.0

v1.83.0 (2026-04-15)

🤖 Pydantic AI Harness is now live with Code Mode powered by Monty!

What's Changed

🚀 Features

• feat: Add XSearchTool and FileSearch support for xAI by @colesmcintosh in #4165
• Allow injecting metadata per tool call with FastMCPToolset by @Boryotto in #4929
• feat(bedrock): add prompt cache TTL support by @imdigitalashish in #4581
• Add Anthropic automatic prompt caching support by @DenysMoskalenko in #4840
• Add 'graceful' end strategy for parallel tool calls by @awkoy in #4333
• Support Agent(output_type=str | None) for optional output by @Pavanmanikanta98 in #4042

New Contributors

• @colesmcintosh made their first contribution in #4165
• @Boryotto made their first contribution in #4929
• @imdigitalashish made their first contribution in #4581
• @awkoy made their first contribution in #4333

Full Changelog: v1.82.0...v1.83.0

v1.82.0 (2026-04-14)

🤖 Pydantic AI Harness is now live with Code Mode powered by Monty!

What's Changed

🐛 Bug Fixes

• Fix OpenAI compaction chain when openai_previous_response_id='auto' by @DouweM in #5086
• Fix orphan-task leak in CombinedToolset and CombinedCapability by @DouweM in #5085
• Lazily compute ToolDefinition.function_signature by @DouweM in #5087

📦 Dependencies

• chore: bump fastmcp 2.x → 3.2.0 by @dsfaccini in #4982

New Contributors

• @gvdongen made their first contribution in #5041

Full Changelog: v1.81.0...v1.82.0

v1.81.0 (2026-04-13)

🤖 Pydantic AI Harness is now live with Code Mode powered by Monty!

What's Changed

🐛 Bug Fixes

• Fix Anthropic compaction usage totals by @pandego in #5068
• Exclude run_id from cache key computation in PrefectAgentInputs by @adtyavrdhn in #3890
• fix: handle boolean JSON Schema nodes in JsonSchemaTransformer by @Dharit13 in #4989
• fix: close pending tool calls on stream error by @proever in #4963
• fix: skip api-version query parameter for Azure AI Foundry serverless endpoints by @Ricardo-M-L in #5071

New Contributors

• @Dharit13 made their first contribution in #4989
• @pandego made their first contribution in #5068

Full Changelog: v1.80.0...v1.81.0

v1.80.0 (2026-04-10)

What's Changed

🚀 Features

• Add CapabilityOrdering (innermost, outermost, wraps, wrapped_by, requires`) by @DouweM in #5036
• Hooks ordering parameter and instance refs in wraps/wrapped_by by @DouweM in #5048
• Add server-side compaction support via OpenAICompaction and AnthropicCompaction capabilities by @DouweM in #4943

🐛 Bug Fixes

• Reverse capability get_wrapper_toolset iteration for consistency with wrap_ hooks by @DouweM in #5036
• Remove warning suppression fixed by the bump to mistral version >= 2.0.0 by @DarthJuri in #4629
• fix: make mcp optional for DBOS module import by @DouweM in #5050
• bug: Warn about Azure OpenAI completions file-incompatibility by @dsfaccini in #4048
• fix: unknown tool calls no longer exhaust global retry counter by @dsfaccini in #4940
• fix: output validators see global retry counter on tool output path by @dsfaccini in #4956

Full Changelog: v1.79.0...v1.80.0

v1.79.0 (2026-04-09)

What's Changed

🚀 Features

• Full support for AG-UI 0.1.13 and 0.1.15: reasoning, multi-modal, dump_messages by @dsfaccini in #3971
• Replace HTTP client cache with create_async_http_client and context manager by @dsfaccini in #4421
• Add apply() to AbstractCapability, CombinedCapability, and WrapperCapability by @DouweM in #5022

🐛 Bug Fixes

• fix: update internal $refs in renamed schema defs, handle missing keywords, and detect semantically different defs by @Ricardo-M-L in #5020
• fix: force streaming in run() when capability/hook overrides wrap_run_event_stream by @DouweM in #5028
• Fix on_node_run_error and after_node_run hook recovery by @DouweM in #5023
• fix: add missing space in provider UserError messages by @graydeon in #4976

New Contributors

• @15r10nk made their first contribution in #4108
• @graydeon made their first contribution in #4976

Full Changelog: v1.78.0...v1.79.0

v1.78.0 (2026-04-07)

What's Changed

🚀 Features

• Add cached token span attributes per OTel spec by @alexmojaki in #5013
• feat: add return_schema and function_signature to ToolDefinition by @adtyavrdhn in #4964
• feat: add SetToolMetadata capability by @DouweM in #4964

New Contributors

• @Ricardo-M-L made their first contribution in #4968
• @chernistry made their first contribution in #5005
• @vladdoster made their first contribution in #4620
• @edmcman made their first contribution in #4584
• @drPod made their first contribution in #4809
• @1Ninad made their first contribution in #4945

Full Changelog: v1.77.0...v1.78.0

v1.77.0 (2026-04-02)

What's Changed

🚀 Features

• feat: add local WebFetch tool and have WebFetch capability use it when provider lacks builtin support by @DEENUU1 in #4906
• Add defer_loading to tools and toolsets to enable tool search by @dsfaccini in #4090
• Add ThreadExecutor capability and Agent.using_thread_executor() by @DouweM in #4942
• feat: smart instruction caching — automatically insert Anthropic/Bedrock cache boundary at static/dynamic split by @Alex-Resch in #4865
• Support server_message_id in VercelAIEventStream by @dsfaccini in #4579

🐛 Bug Fixes

• fix: run output validators for image outputs by @dsfaccini in #4938
• Wrap streaming SDK errors in ModelHTTPError/ModelAPIError by @dsfaccini in #4889

New Contributors

• @Alex-Resch made their first contribution in #4865

Full Changelog: v1.76.0...v1.77.0