> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getbifrost.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# v1.5.0-prerelease3

> v1.5.0-prerelease3 changelog - 2026-04-13

<Tabs>
  <Tab title="NPX">
    ```bash theme={null}
    npx -y @maximhq/bifrost --transport-version v1.5.0-prerelease3
    ```
  </Tab>

  <Tab title="Docker">
    ```bash theme={null}
    docker pull maximhq/bifrost:v1.5.0-prerelease3
    docker run -p 8080:8080 maximhq/bifrost:v1.5.0-prerelease3
    ```
  </Tab>
</Tabs>

<Update label="Bifrost(HTTP)" description="1.5.0-prerelease3">
  ## ✨ Features

  * **OAuth MCP** - add next-step hints to OAuth MCP client creation response
  * **Azure passthrough** - added azure passthrough support
  * **272k token tier** - add 272k token tier pricing support in pricing
  * **Flex and priority tier support** - added flex and priority tier support in pricing

  ## 🐞 Fixed

  * **Streaming Post-Hook Race** - Fix race condition where fasthttp RequestCtx could be recycled before transport post-hooks complete in streaming goroutines; eagerly captures request/response snapshots before handler returns
  * **Async User Values** - Propagate user values through all async inference handlers and job submissions
  * **Trace Completer Safety** - Refactor trace completer to accept transport logs as parameter instead of reading from potentially recycled context
  * **Async Log Store Exceptions** - Fix exception handling in async log store jobs
  * **Model Alias Tracking** - Split ModelRequested into OriginalModelRequested and ResolvedModelUsed for accurate model alias resolution tracking
  * **MCP Tool Discovery** - Add discovered tools and tool name mapping columns to MCP clients
</Update>

<Update label="Core" description="1.5.2">
  * refactor: split ModelRequested into OriginalModelRequested and ResolvedModelUsed for model alias tracking
  * refactor: simplify Azure passthrough by removing redundant config nil checks
  * refactor: simplify Mistral error parsing signature
  * fix: carry ProviderResponseHeaders through text completion response conversion
</Update>

<Update label="Framework" description="1.3.2">
  * feat: add MCP client discovered tools and tool name mapping migration
  * fix: exception handling in async log store jobs
  * refactor: model catalog Init API to use SetShouldSyncGate method
  * refactor: rename DefaultPricingSyncInterval to DefaultSyncInterval
</Update>

<Update label="compat" description="0.1.1">
  * chore: upgraded core to v1.5.2 and framework to v1.3.2
</Update>

<Update label="governance" description="1.5.2">
  * chore: upgraded core to v1.5.2 and framework to v1.3.2
</Update>

<Update label="jsonparser" description="1.5.2">
  * chore: upgraded core to v1.5.2 and framework to v1.3.2
</Update>

<Update label="litellmcompat" description="0.1.2">
  * chore: upgraded core to v1.5.2 and framework to v1.3.2
</Update>

<Update label="logging" description="1.5.2">
  * chore: upgraded core to v1.5.2 and framework to v1.3.2
</Update>

<Update label="maxim" description="1.6.2">
  * chore: upgraded core to v1.5.2 and framework to v1.3.2
</Update>

<Update label="mocker" description="1.5.2">
  * chore: upgraded core to v1.5.2 and framework to v1.3.2
</Update>

<Update label="otel" description="1.2.2">
  * chore: upgraded core to v1.5.2 and framework to v1.3.2
</Update>

<Update label="prompts" description="1.0.2">
  * chore: upgraded core to v1.5.2 and framework to v1.3.2
</Update>

<Update label="semanticcache" description="1.5.2">
  * chore: upgraded core to v1.5.2 and framework to v1.3.2
</Update>

<Update label="telemetry" description="1.5.2">
  * chore: upgraded core to v1.5.2 and framework to v1.3.2
</Update>