Latest
  1. Johns Hopkins Bayview tells 3,182 patients an employee put their health data into a public AI tool
  2. China’s AI compute access expected to double in 2027, with US-designed chips about 65 per cent
  3. UK commits £100m to national AI Biosecurity Lab
  4. Moonshot AI releases Kimi K3.1 Pro with 1-million-token context window
  5. Residents in Newport and Cardiff oppose hyperscale datacentres near homes
  6. Study: Grok 4.7 picked Republicans in 92% of forced midterm answers, GPT-6.1 Sol picked Democrats in 97%
  7. Attackers exploiting the PHP flaws hand the break-in to AI agents, Unit 42 says
  8. Elvis Presley’s rightsholders sue Anthropic over training on 274 songs

Latest / Frontier models and safety

Model releaseFrontierUSConfirmed

Anthropic releases Claude Opus 4.8 with user-set effort levels

See how this story connects

Source: Anthropic: Introducing Claude Opus 4.8

Anthropic released Claude Opus 4.8, which builds on Opus 4.7 with improvements across benchmarks, at the same $5 and $25 per million token pricing, with a fast mode at $10 and $50. Users of claude.ai gained control over how much effort Claude puts into a task.

Why it matters

Opus 4.8 later served as the fallback model for requests that Fable 5’s safeguards blocked.

When
28 May 2026
ID
WTA-N-2026-0167
Who
Anthropic

Summary by wheresthe.ai, from Anthropic. Checked against the source on 9 Oct 2026.

Read the original at Anthropic

Source copy: download the page as saved on 18 Oct 2026 (PDF). Also held by the Internet Archive.

Next stop on this Storyline: Led toAnthropic releases Claude Opus 5, near Fable 5 at half the price

Cite this story

WTA-N-2026-0167: “Anthropic releases Claude Opus 4.8 with user-set effort levels.” wheresthe.ai, 28 May 2026. https://wheresthe.ai/d/anthropic-claude-opus-4-8-release-2026-05/ (source: Anthropic: Introducing Claude Opus 4.8).

Spotted an error? Email [email protected].