Opus 5.5
Opus 5.5 is a language model from Anthropic, first covered on 22 September 2026.
Last updated
At a glance
- Made by
- Anthropic
- Type
- Language model
- Availability
- Not stated
- Licence
- Not stated
- Context window
- Not stated
- First seen
- 22 September 2026
Taken from the coverage, not from our own testing; "not stated" means none of the reports we read gave it. All tracked models →
3 stories about Opus 5.5
-
Anthropic engineer says Claude's writing declined as newer models focus on code
Jackson Kernion, an Anthropic engineer who works on Claude fine‑tuning, said the model’s writing quality has stalled or even worsened despite improvements in math, code, and reasoning. He explained that after Opus 4.6…
1 sourceThe Decoder -
Palantir CEO questions OpenAI IPO due to liability risks
Palantir CEO Alex Karp suggested frontier AI labs like OpenAI may never go public because of their potential for unlimited liability. In a September 17 interview on CNBC, Karp argued that government nationalization…
1 sourcefinance.yahoo.com -
Anthropic releases Claude Opus 5.5 and OpenAI counters with cheaper GPT-6 Sol and Luna models
Anthropic released Claude Opus 5.5 on September 22, 2026, reducing input and output token prices by 20% to $4 and $20 per million tokens, with cache reads down 60% to 20 cents. Minutes later, OpenAI launched GPT-6 Sol…
28 sourcesCNBC TechnologyThe Rundown AIMarkTechPostbusinesstoday.in +19 more
