CATCH #1701
DETECTED SEP 28, 2026 18:28 UTC
THE CATCHscore 9/10
EXHIBIT 1701 · FLASH
Sep 28, 2026 18:28 UTC
github_releases+hn+model_catalog+npm+pages+pypi+sitemap
@anthropic-ai/sdk
Anthropic's SDK update 0.129.0 suggests new `claude-sonnet-5-5` model with tool runner compaction, and new `POST /v1/messages` and `POST /v1/messages/count_tokens` endpoints.
✓ VERIFIED — BEAT THE ANNOUNCEMENT BY 0.0H · AUTO-VERIFIED AGAINST ANTHROPIC NEWS
READY TO POST:
anthropic's latest sdk update hints at a new `claude-sonnet-5-5` model, plus tool runner improvements like server-side compaction. could be big for tool use!
looks like anthropic is adding new endpoints for messages and token counting in their sdk, alongside a new model id `claude-sonnet-5-5`. keeping an eye on this.
EVIDENCE — the receipts
[MERGED across 9 sources: github_releases, hn, model_catalog, npm, pages, pypi, sitemap]
shared signal: claude-code, claude-haiku-4-5, claude-opus-4-8, claude-sonnet-5-5
--- model_catalog :: litellm model catalog ---
Model catalog: 20 new model ids appeared across cloud providers
[watched families / cloud] (20)
+ aihubmix/claude-sonnet-5-5
+ anthropic.claude-sonnet-5-5
+ apac.anthropic.claude-sonnet-5-5
+ au.anthropic.claude-sonnet-5-5
+ azure_ai/claude-sonnet-5-5
+ bedrock/us-gov-east-1/anthropic.claude-sonnet-5-5
+ bedrock/us-gov-west-1/anthropic.claude-sonnet-5-5
+ claude-sonnet-5-5
+ databricks/databricks-claude-sonnet-5-5
+ deepinfra/anthropic/claude-sonnet-5-5
+ eu.anthropic.claude-sonnet-5-5
+ global.anthropic.claude-sonnet-5-5
+ jp.anthropic.claude-sonnet-5-5
+ openrouter/anthropic/claude-sonnet-5-5
+ openrouter/anthropic/claude-sonnet-5-5:batch
+ perplexity/anthropic/claude-sonnet-5-5
+ us-gov.anthropic.claude-sonnet-5-5
+ us.anthropic.claude-sonnet-5-5
+ vertex_ai/claude-sonnet-5-5
+ vertex_ai/claude-sonnet-5-5@default
--- npm :: @anthropic-ai/sdk ---
@anthropic-ai/sdk 0.128.0 -> 0.129.0: +705 strings, -1808 strings, 41 flagged as interesting
[model_id] (1)
+ claude-sonnet-5-5
[feature_flag] (3)
+ client.beta.messages.stream()
+ client.beta.models
+ ts
* declare module '@anthropic-ai/sdk/internal/request-options' {
* interface RequestOptions {
* myContext?: string;
* }
* }
*
[endpoint] (2)
+ POST /v1/messages
+ POST /v1/messages/count_tokens
[sentence] (36)
+ ts
* declare module '@anthropic-ai/sdk/internal/request-options' {
* interface RequestOptions {
* myContext?: string;
* }
* }
*
+ `compactionControl` has been removed from the tool runner. Use server-side compaction instead:
+ `runToolsEagerly: true` needs `stream: true` in the tool runner's params, because a reply that
+ call `runner.compactBeforeNextTurn()` when the conversation should be compacted.
+ fr
caught by the 20-minute sweep ·
the live wire · all receipts