Leaked specifications show Anthropic's Claude Sonnet 5 launching today with a 1 million token context window https://t.c…
Rohan Paul Twitter · Rohan Paul (@rohanpaul_ai) · 2026-06-30
Leaked specifications reportedly show Anthropic's Claude Sonnet 5 launching on June 30, 2026 with a 1 million token context window, a January 2026 knowledge cutoff, and a promotional pricing rate of $2/$10 per million tokens.
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Extraction
Topics: anthropicclaude-sonnet-5llm-releasescontext-windowllm-pricing
Claims
- Claude Sonnet 5 is alleged to be launching on June 30, 2026.
- The model reportedly offers a 1 million token context window variant.
- The knowledge cutoff is reportedly January 2026.
- Promotional pricing is set at $2 per million input tokens and $10 per million output tokens.
- Changes have reportedly been made behind the scenes to Anthropic's infrastructure to prepare for the promotional pricing.
Key quotes
🚨 SCOOP: Claude Sonnet 5 is releasing later today
1M context variant available
Some changes have been made behind the scenes to prepare for a promo price offering, preliminary values