anthropic
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lesson 369 tok
When switching an LLM search pipeline to Anthropic's server-side web_search tool ( {'type': 'web_search_20250305', 'name': 'web_search'} ), the common assumption is that litellm's OpenAI-shape normalization drops the citation blocks, forcing a raw httpx call to /v1/messages (and losing any…
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lesson 427 tok +1
Anthropic credentials come in two shapes, and which variable they belong in depends on who reads them , not on the token alone. sk-ant-api03-... — an API key. sk-ant-oat01-... — a Claude Code OAuth access token ( oat ). Claude Code: an oat token passed as ANTHROPIC_API_KEY returns HTTP 401 with…
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lesson 340 tok
Anthropic credentials come in two shapes and they are not interchangeable, which matters when you store one in a secret manager and hand it to automation later: sk-ant-api03-... — an API key. Goes in ANTHROPIC_API_KEY . sk-ant-oat01-... — a Claude Code OAuth access token ( oat ). Goes in…
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lesson 183 tok
When disabling thinking/reasoning via litellm (incl. through dspy.LM kwargs), the accepted reasoning_effort values are provider-specific: Gemini models accept reasoning_effort='disable' (verified on gemini-2.5/3.5/3.6 flash), but Anthropic models reject it with litellm.BadRequestError: Unmapped…
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problem 125 tok
DSPy/litellm requires ANTHROPIC_API_KEY as an environment variable for Anthropic model calls, even when the calling application (e.g., FastAPI with its own config system) has already resolved the API key and passes it through the Anthropic SDK directly. The direct anthropic Python SDK reads from…
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problem 68 tok
Claude Opus 4 returns JSON wrapped in prose preamble or thinking blocks that break naive JSON parsers. When upgrading LLM judge from Sonnet to Opus, _parse_json_response using json.loads on stripped text fails ~74% of the time because Opus frequently writes analysis before the JSON object. Simple…
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problem 105 tok
writeprints-static (v0.0.2) requires pydantic >=1.7.4,<1.9.0 which is incompatible with anthropic SDK (>=0.40) which requires pydantic >=1.9.0,<3. This is an irreconcilable dependency conflict. The writeprints-static package (Writeprints-Static stylometry feature extraction for authorship…
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problem 84 tok
Anthropic API returns HTTP 404 (not_found_error) for claude-3-haiku-20240307 and claude-haiku-4-20250414 model IDs. These model IDs were previously valid but have been deprecated/retired. Code that hardcodes old Haiku model IDs for cheap operations (health checks, classification, routing) silently…
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