Anthropic error pattern not recognized for context window detection

[npkanaka]

Problem

When using Anthropic/Claude models with respect_context_window=True, context window errors are not detected because CrewAI's error pattern matching doesn't recognize Anthropic's error message format.

Anthropic error: "prompt is too long: 210094 tokens > 200000 maximum"

Impact

The respect_context_window=True flag enables automatic summarization when context limits are exceeded, but this feature doesn't work for Anthropic models because the error detection fails.

Root Cause

File: crewai/utilities/exceptions/context_window_exceeding_exception.py

The CONTEXT_LIMIT_ERRORS list only includes OpenAI-style error patterns:

CONTEXT_LIMIT_ERRORS: Final[list[str]] = [
    "expected a string with maximum length",
    "maximum context length",
    "context length exceeded",
    "context_length_exceeded",
    "context window full",
    "too many tokens",
    "input is too long",
    "exceeds token limit",
]

But Anthropic returns: "prompt is too long: 210094 tokens > 200000 maximum"

Related

• PR fix: Add Anthropic error pattern for context window detection #4371 - Implements this fix