Answer: The latest Claude model ID for the API is claude-fable-5-2, listed first among the current models. The other current API IDs are claude-opus-5-5, claude-sonnet-5-5, and claude-haiku-5-5.
Status: Confirmed
Entry: model/claude-api-id
Revision: 1
Digest: sha256:6c9c5937b1731c13 (changes whenever the content changes)

Timeline:
  Created: 2026-11-12T11:23:48Z
  Last changed: 2026-11-12T11:23:48Z
  Last verified: 2026-11-12T11:33:59Z
  Next check: 2026-11-13T11:33:59Z
  Check interval: Daily
  Expected change: No fixed schedule

Data:
  Field | Value | Source | As of
  Claude API ID (Fable 5.2) | claude-fable-5-2 | [1] | 2026-11-12
  Claude API alias (Fable 5.2) | claude-fable-5-2 | [1] | 2026-11-12
  Claude API ID (Opus 5.5) | claude-opus-5-5 | [1] | 2026-11-12
  Claude API ID (Sonnet 5.5) | claude-sonnet-5-5 | [1] | 2026-11-12
  Claude API ID (Haiku 5.5) | claude-haiku-5-5 | [1] | 2026-11-12
  Recommended default model | Claude Opus 5.5 | [1] | 2026-11-12

Sources:
  [1] Anthropic. "Models overview - Claude Platform Docs". https://docs.claude.com/en/docs/about-claude/models/overview
      Role: primary. Accessed: 2026-11-12T11:33:59Z
      Quote: "Claude API ID claude-fable-5-2 claude-opus-5-5 claude-sonnet-5-5 claude-haiku-5-5" (Supports: Claude API ID (Fable 5.2), Claude API ID (Opus 5.5), Claude API ID (Sonnet 5.5), Claude API ID (Haiku 5.5))
      Quote: "Claude API alias claude-fable-5-2 claude-opus-5-5 claude-sonnet-5-5 claude-haiku-5-5" (Supports: Claude API alias (Fable 5.2))
      Quote: "If you’re unsure which model to use, start with Claude Opus 5.5 for most workloads." (Supports: Recommended default model)
      Snapshot SHA-256: aea6adb008bda8c4d21838f40641e74337103142d88672b1263c17996c57f29e (captured 2026-11-12T10:44:24Z)

Verification:
  Method: Automated extraction from [1] with deepseek-flash (JSON output, thinking disabled). Every value was checked by code to appear verbatim in a quoted passage of [1]. On this check the text of [1] was unchanged since 2026-11-12T11:23:48Z, so the values verified then were kept.
  Cross-check: not-available at 2026-11-12T11:33:59Z. No independent second source is configured for this entry
  Last successful check: 2026-11-12T11:33:59Z
  Last attempt: 2026-11-12T11:33:59Z

Notes and limitations:
  Extracted automatically from a single official source.

Change log:
  Time | Event | Change | Source
  2026-11-12T11:23:48Z | added | Entry created | —
  Changes for this entry as a feed: https://latestn.com/model/claude-api-id/latest

Challenge this entry:
  Open challenges: None
  How: If a value here is wrong or out of date, send what is wrong and a link to evidence. Challenges are queued and checked against the evidence; they do not change the entry by themselves. If the entry changes as a result, the change log says so.
  Form: https://latestn.com/dispute/model/claude-api-id
  POST: https://latestn.com/dispute/model/claude-api-id with claim, evidence_url, and optionally field and contact (form-encoded or JSON)
  GET: https://latestn.com/dispute/model/claude-api-id?claim={what is wrong}&evidence_url={link}

How to cite:
    latestN. (2026). What is the latest Claude model ID for the API? Revision 1, last verified 2026-11-12T11:33:59Z. https://latestn.com/model/claude-api-id (accessed 2026-11-12T12:52:51Z).

    @misc{latestN_model_claude_api_id_r1,
      title        = {What is the latest Claude model ID for the API?},
      author       = {{latestN}},
      year         = {2026},
      howpublished = {\url{https://latestn.com/model/claude-api-id}},
      note         = {Revision 1; digest sha256:6c9c5937b1731c13; last verified 2026-11-12T11:33:59Z; accessed 2026-11-12T12:52:51Z}
    }

URL: https://latestn.com/model/claude-api-id