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Claude Opus 5 is now available in Claude Code and on the Claude Platform, with some details worth noting.
- Claude Code
- 上线
- Claude Opus 5
- Launch
Opus 5 Launch: My Favorite Graphs – More Token-Efficient, Smarter, and My Go-To for Coding
Published Jul 24, 2026The Anthropic team shared their favorite graphs from the Opus 5 launch, highlighting the model's token efficiency and intelligence improvements. The author finds it smooth to use and prefers it over Fable 5 for many coding tasks.
- Anthropic
- coding
- Fable 5
- token efficiency
- Opus 5
A user exclaims that Opus 5 is dominating Fable 5 in benchmarks, saying 'it's so over, man.'
- benchmark
- Fable 5
- Opus 5
- News
JUST IN: Anthropic unveils Opus 5 with Fable 5-level features at half the cost
Published Jul 24, 2026Anthropic has officially launched Opus 5, offering features comparable to Fable 5 at half the cost.
- Anthropic
- cost
- AI model
- Fable 5
- Opus 5
- Discussion
Insane Opus 5 numbers: faster iteration, scaled RL, 85% fewer classifier interventions
Published Jul 24, 2026A user discusses Opus 5's impressive metrics: faster iteration speed and scaled RL (Fable 5 is too large for RL yet). On safety, classifiers are expected to intervene about 85% less than Fable 5.
- RL
- safeguards
- classifier
- Opus 5
- iteration speed
- News
ChatGPT Helps Discover Rare Gene Mutation, Brain Cancer Patient Gets Correct Diagnosis After 5 Years
Published Jul 24, 2026A patient diagnosed with glioblastoma and given months to live defied expectations for five years. Her husband used ChatGPT to interpret radiology reports, revealing an IDH1 mutation that led to a re-diagnosis of IDH-mutant astrocytoma with a better prognosis.
- ChatGPT
- 医疗AI
- 胶质母细胞瘤
- IDH1突变
- 真实故事
Opus 5 debuts at #2 on the Vals Index with 74.8%, less than a point behind Fable 5 (75.1%), and claims first on 14 of 27 benchmarks.
- benchmark
- Fable 5
- Opus 5
- Vals Index
- News
Claude Opus 5 now available in Cursor – matches Fable 5 performance at half price
Published Jul 24, 2026In Cursor, Claude Opus 5 scores similarly to Fable 5 on CursorBench (66.7 vs 66.5) at half the price and supports Zero Data Retention.
- Cursor
- 集成
- Claude Opus 5
- Idea
Opus 5 first look: breaks backward compatibility but shines when starting fresh
Published Jul 24, 2026After a week of testing, the author finds Opus 5 incompatible with existing workflows, stopping early or missing instructions. However, starting from scratch yields much better results. Medium or low thinking effort works better. The author calls it a 'poor man's Fable' and will likely use it only when Fable tokens run out.
- 测试
- 工作流
- 体验
- Opus 5
Reports indicate that Claude Opus 5 surpasses Fable 5 in multiple benchmarks while costing half as much.
- 对比
- Fable 5
- Opus 5