Updated

Claude Opus 5 spotted on DesignArena

Confirmed · 14 evidence linksFirst seen 8 Sep 2026, 20:56 UTCUpdated 14 Nov 2026, 18:15 UTCRecorded automatically by Signal Forge

Claude Opus 5 is a model from Anthropic, released on 24 Jul 2026. First seen 8 Sep 2026. Catalogues list a 1,000,000 tokens context window. 14 evidence links.

Facts as of 12 Nov 2026, 16:15 UTC

Context window: 1,000,000
Input · USD / 1M tokens: $5.00
Output · USD / 1M tokens: $25.00
Max output: 128,000
Input: text · image
Output: text
Cached input · USD / 1M tokens: $0.50

Alex's take

Alex · 19 Sep“I castrated Claude Code. Ripped almost everything out and left only the bare minimum: read, inspect, write. Startup context is now under 2k tokens. I also capped the context window at 200k tokens so it compacts earlier…”

Evidence links 14

DesignArena · gamedev
evidence linkdesignarena.ai
DesignArena · website
evidence linkdesignarena.ai
DesignArena · dataviz
evidence linkdesignarena.ai
DesignArena · uicomponent
evidence linkdesignarena.ai
DesignArena · website
evidence linkdesignarena.ai
DesignArena · uicomponent
evidence linkdesignarena.ai
Arena · leaderboards
evidence linkanthropic.com
VoxelBench · leaderboard
evidence linkvoxelbench.ai
OpenRouter
evidence linkopenrouter.ai
OpenRouter
evidence linkopenrouter.ai
models.dev · catalogue
evidence linkmodels.dev
Artificial Analysis · benchmarks
evidence linkartificialanalysis.ai
OpenCode · discovery
evidence linkopencode.ai
Vercel AI Gateway
evidence linkvercel.com

Related signals

19:059 Nov

AnthropicReleased

Claude Fable 5.2

Supported

18:539 Nov

AnthropicReleased

Claude Fable 5.2

Confirmed18 evidence links

19:177 Oct

AnthropicSighting

Claude Haiku 5.5 (Max, Default Fallback) enters at 43.4 on the Intelligence Index

Confirmed19 evidence links