Claude Opus 4.6
It helps people write computer code and complete long professional tasks.
anthropic’s large language model, able to hold about 1000k tokens of context (roughly 750k words) in one conversation, working across text and image and file->text. You reach it through an API or through tools built on it. Built for professionals who write code and manage long tasks. anthropic describes it as: “Opus 4.6 is Anthropic’s strongest model for coding and long-running professional tasks.” source ↗
Our tested score
Battle record
0W – 4L
in our published battles
Forum sentiment — 90d to 12 Aug 2026
50%
developer-forum posts: 4 opinions in 49
stale — measured 40 days ago, not re-swept since
What people are posting (90 days)
Loudest post this quarter
“Is Opus 5 really lobotomized or it’s just me doing something wrong?”
Battles fought
Compare Claude Opus 4.6 against…
GPT-5.6 Sol · essay writingGPT-5.5 · essay writingGPT-5.6 Luna · essay writingGPT-5.6 Terra · essay writingGPT-5.3-Codex · essay writingClaude Sonnet 5 · essay writingGrok 4.5 · essay writingQwen3.7 Max · essay writingGemini 3.1 Pro Preview · essay writingClaude Opus 4.8 · summarising documentsGPT-5.5 · summarising documentsGPT-5.6 Luna · summarising documentsGPT-5.6 Terra · summarising documentsGPT-5.3-Codex · summarising documentsDeepSeek V4 Pro · summarising documentsGPT-5.6 Sol · summarising documentsClaude Sonnet 5 · summarising documentsClaude Fable 5 · summarising documentsClaude Opus 4.8 · everyday maths
Every claim we hold (6)
- api price in per 1m5 USD/1M tokensOpenRouter API21 Sept 2026stale
- api price out per 1m25 USD/1M tokensOpenRouter API21 Sept 2026stale
- arena elo text1498 EloLMArena leaderboard (CC-BY-4.0)14 Sept 2026verified
- arena rank text5 rankLMArena leaderboard (CC-BY-4.0)14 Sept 2026verified
- arena votes text75878 votesLMArena leaderboard (CC-BY-4.0)14 Sept 2026verified
- context length1000000 tokensOpenRouter API21 Sept 2026stale