Posts tagged model-update

3 posts about model-update.

• Claude Sonnet 5's New Tokenizer: 41% More Tokens per Prompt

  July 1, 2026 · claude-sonnet-5 · prompt-cache · cost · model-update

  Claude Sonnet 5's new tokenizer makes the same text about 41% more tokens than Sonnet 4.6, reshaping cost, budgets, and cache eligibility on the gateway.

• Claude Fable 5 Caching: Same Contract, 2.9x the Bill vs Opus 4.6

  June 10, 2026 · claude-fable-5 · prompt-cache · tokenizer · model-update

  Claude Fable 5 is live on Synthorai. Measured prompt caching, TTL, tokenization and cost vs Opus 4.6/4.8: same cache contract, new tokenizer, ~2.9x the bill.

• Claude Opus 4.8 on Synthorai: Caching & TTL vs 4.7/4.6

  May 29, 2026 · claude-opus-4-8 · prompt-cache · model-update

  Claude Opus 4.8 is live on Synthorai. Measured prompt caching and TTL behavior vs Opus 4.7/4.6 — what carries over, plus the tokenizer shift to re-check.