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anthropic-messages: skip usage fields if empty (#6611)

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fixes: #6567
This commit is contained in:
David Brailovsky
2026-07-13 18:07:59 +02:00
committed by GitHub
parent 1f0dbc008c
commit 0e6909f050
2 changed files with 49 additions and 19 deletions
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packages/ai/src/api/anthropic-messages.ts
+21 -19
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@@ -703,25 +703,27 @@ export const stream: StreamFunction<"anthropic-messages", AnthropicOptions> = (
}
// Only update usage fields if present (not null).
// Preserves input_tokens from message_start when proxies omit it in message_delta.
if (event.usage.input_tokens != null) {
output.usage.input = event.usage.input_tokens;
}
if (event.usage.output_tokens != null) {
output.usage.output = event.usage.output_tokens;
}
if (event.usage.cache_read_input_tokens != null) {
output.usage.cacheRead = event.usage.cache_read_input_tokens;
}
if (event.usage.cache_creation_input_tokens != null) {
output.usage.cacheWrite = event.usage.cache_creation_input_tokens;
}
// Anthropic reports reasoning tokens in `output_tokens_details.thinking_tokens` on the
// final message_delta usage (a subset of output_tokens). SDK 0.91.1 omits the field from
// its Usage type, so read it through a narrow cast. Verified against the live API.
const thinkingTokens = (event.usage as { output_tokens_details?: { thinking_tokens?: number } })
.output_tokens_details?.thinking_tokens;
if (thinkingTokens != null) {
output.usage.reasoning = thinkingTokens;
if (event.usage) {
if (event.usage.input_tokens != null) {
output.usage.input = event.usage.input_tokens;
}
if (event.usage.output_tokens != null) {
output.usage.output = event.usage.output_tokens;
}
if (event.usage.cache_read_input_tokens != null) {
output.usage.cacheRead = event.usage.cache_read_input_tokens;
}
if (event.usage.cache_creation_input_tokens != null) {
output.usage.cacheWrite = event.usage.cache_creation_input_tokens;
}
// Anthropic reports reasoning tokens in `output_tokens_details.thinking_tokens` on the
// final message_delta usage (a subset of output_tokens). SDK 0.91.1 omits the field from
// its Usage type, so read it through a narrow cast. Verified against the live API.
const thinkingTokens = (event.usage as { output_tokens_details?: { thinking_tokens?: number } })
.output_tokens_details?.thinking_tokens;
if (thinkingTokens != null) {
output.usage.reasoning = thinkingTokens;
}
}
// Anthropic doesn't provide total_tokens, compute from components
output.usage.totalTokens =