Source Intelligence
Reading a new release v2.1.251 Analysing changes · 2/5 Writing the entries · 2/4 steps 470 findings $18.91 so far

DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

All of v1.0.76 Home All releases olderv1.0.74 v1.0.77newer
Claude Code v1.0.76

Sonnet 4 with 1M Context Support

What: Added support for Claude Sonnet 4 model with 1-million token context window How to use:

# Switch to the 1M context model through the model selector
# The model will appear as "Sonnet (1M context)" in your model options
# Note: This feature requires API access verification

Details:

  • Available as "Sonnet (1M context)" or "Sonnet 4 (with 1M token context)" in the model selector
  • Provides 1,000,000 tokens of context (5x the standard 200,000 limit)
  • Perfect for working with large codebases, lengthy documents, or extended coding sessions
  • Pricing: $6 per million input tokens, $22.50 per million output tokens
  • Access is controlled via API verification - only available to eligible accounts
  • Uses rate limits faster than standard Sonnet on long requests
  • Context warnings are intelligently adjusted to avoid premature alerts when you still have hundreds of thousands of tokens available

Related

Other releases about the same thing. Found by shared names or similar wording; neither means one caused the other.

See this entry in the whole of v1.0.76 →