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fix(provider): guard textVerbosity injection for @ai-sdk/openai-compatible providers - #43915
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neriousy merged 1 commit intoAug 21, 2026
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…tible providers Only enable the gpt-5.x textVerbosity default for integrations known to implement OpenAI's verbosity parameter (@ai-sdk/openai and @ai-sdk/amazon-bedrock/mantle). Previously the guard excluded only Azure, so generic @ai-sdk/openai-compatible providers (e.g. LiteLLM proxies) received textVerbosity as well. When such a proxy routes to AWS Bedrock behind the scenes, Bedrock rejects the resulting verbosity parameter with litellm.UnsupportedParamsError, breaking every request (including configured fallbacks) to any gpt-5.x model on that provider. This mirrors the existing reasoningSummary guard pattern fixed in anomalyco#21237 / anomalyco#22352, which textVerbosity never received. Fixesanomalyco#43911
neriousy
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August 21, 2026 22:07
neriousy
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Aug 21, 2026
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Thanks for the PR! |
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Issue for this PR
Closes#43911
Type of change
What does this PR do?
options()intransform.tssetstextVerbosity: "low"for anygpt-5.xmodel as long asproviderID !== "azure". That guard allows the default through for generic@ai-sdk/openai-compatibleproviders too (e.g. a LiteLLM proxy), which is wrong:verbosityis an OpenAI-specific parameter, and non-OpenAI backends behind such a proxy reject it outright.Concretely, a
gpt-5.6model routed through a LiteLLM@ai-sdk/openai-compatibleprovider to AWS Bedrock ("Bedrock Mantle") fails every request with:This is the same bug class already fixed for
reasoningSummaryin #21237 / #22352 (unconditional injection for gpt-5.x, guarded only against Azure instead of an explicit allowlist).textVerbositynever got the equivalent fix.The fix switches the check from a denylist (
providerID !== "azure") to an allowlist of providers known to actually implementverbosity:@ai-sdk/openaiand@ai-sdk/amazon-bedrock/mantle. Everything else (including@ai-sdk/openai-compatible,@ai-sdk/azure,@ai-sdk/github-copilot) no longer receivestextVerbosity, matching howreasoningSummary/includeare already scoped a few lines above in the same function.How did you verify your code works?
bun test test/provider/transform.test.ts— 411 pass, 0 fail (added an explicitexpect(result.textVerbosity).toBeUndefined()assertion to the existingopenai-compatible gpt-5 models omit Responses-only reasoningSummarytest).bun turbo typecheck— 30/30 packages pass.textVerbosityis correctly omitted from the request and the call succeeds.Screenshots / recordings
N/A — no UI change.
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