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Sweep 22 Oct 2026 · 21:04Z Build v2.1.309 528 read Stable v2.1.308 Latest v2.1.309 Next v2.1.309 Feeds RSS JSON llms.txt llms-full.txt Unofficial

Claude Code v2.1.248 ·

Clearer error when a proxy or gateway returns something that is not an API response

Bad responses from proxies and gateways now name the intermediary instead of a generic error.

You'll notice New Features
JSON All of v2.1.248
You'll noticeTier: how much it should matter to you
4Useful: my rating, 1 to 5
2Signal: worth watching, 1 to 5
API ErrorsArea: what it touches
New FeaturesKind: in v2.1.248,
What probably matters to youSection of the release
What

An empty or malformed API response now raises a dedicated error that names what the body actually was and points at intermediaries between you and the API. It recognises common gateways (litellm, helicone, portkey, cloudflare-ai-gateway, kong, braintrust), Databricks hosts, reverse proxies identified by their Server: header (cloudflare, envoy, nginx, apigee, akamai, zscaler and others), and Apigee fault codes, and preserves hop headers in the report. Live on this build with no flag.

Details
  • One diagnosed case is a non-streaming request answered with an event stream, which is called out by name.
Evidence

body is an event stream (the non-streaming request was answered with a stream)

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.248 →

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