Anthropic's mid-tier model now supports 1 million token context — previously only available on Opus.
What this means for you
Claude Sonnet 4.6 can now accept up to 1 million tokens (~750K words) in a single API call, at $3/$15 per million tokens. Previously you needed Opus ($5/$25) for that context length.
Bottom line impact
Long-document workflows now cost 40% less than running them through Opus. If you use Claude for large docs, test whether Sonnet quality is sufficient — if yes, you save immediately.
Should you care?
↗ Maybe
Yes if you use Opus specifically for context length rather than quality. You may be able to migrate those workloads to Sonnet and save 40% per call.
Test your long-context prompts on Sonnet 4.6. If output quality is acceptable, migrate to save costs. Note: beta feature — may have higher latency.
Potential 40% savings if migrating long-context workloads from Opus to Sonnet
1M context now accessible at Sonnet pricing. Beta — may have latency variability.
No policy changes.
Anthropic API Pricing
https://platform.claude.com/docs/en/about-claude/pricing
The New Stack — Sonnet 4.6 coverage
https://thenewstack.io/claude-sonnet-46-launch/
Mardii links only to official provider pages.
Claude Opus 4.6 launched — 1M context, agent teams, same pricing
8 days earlier
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