Intelligence index
Outperforms 97% of compared models
Claude Fable 5
Claude Fable 5 is a Mythos-class model from Anthropic, built for autonomous knowledge work and coding. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token context window. It is suited for long-running, complex, and asynchronous tasks that previously required frequent human check-ins.
It is particularly strong at end-to-end work that would otherwise take a person hours, days, or weeks - taking on problems that are long-running, ambiguous, or highly multi-step. It executes well-scoped tasks with few mistakes, automatically self-correcting through verification loops, and ships with robust safeguards.
- Input / output price
- $10/$50per 1M tokens
- Context
- 1.0M
- Released
- 2026-06-09
Pricing
Artificial Analysis
Explore rankingsCoding index
Outperforms 95% of compared models
Agentic index
Outperforms 91% of compared models
Design Arena
Elo scores and win rates across design and agent tasks.
Category performance
1,000-1,500 EloModel Arena
Asciiart
1326Elo
Win rate 68.1%
SVG
1298Elo
Win rate 62.6%
Game Development
1335Elo
Win rate 60.8%
Data Visualization
1304Elo
Win rate 57.5%
Code Categories
1309Elo
Win rate 57.6%
UI Component
1313Elo
Win rate 58.1%
3D
1316Elo
Win rate 61.8%
Website
1294Elo
Win rate 56%
Agent Arena
Agenticgamedev
1247Elo
Win rate 61.9%
Agentichtmlslides
1254Elo
Win rate 59.4%
Agenticslides(html)
1252Elo
Win rate 59.5%
Androidnative
1282Elo
Win rate 65.1%
Godotgamedev
1292Elo
Win rate 64.3%
Htmlslides
1173Elo
Win rate 63.1%
Python-pptxslides
1250Elo
Win rate 61.4%
Fullstack
1280Elo
Win rate 58.2%
Mobile Apps
1262Elo
Win rate 60.4%
Webapps
1261Elo
Win rate 56.3%
Related Models
Claude Opus 5.5
anthropicClaude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code review and bug finding, financial and scientific analysis, and reading dense charts, diagrams, and screenshots, and it is more careful than its predecessor about only stating figures and citing sources it can back up. The model completes comparable tasks in fewer steps and with fewer tokens than Opus 5, and reports on its work in plainer language, with clear updates on what it did, what it found, and what it needs from the user. Thinking is always adaptive, so effort is the main lever for trading off depth, latency, and cost, and lower effort settings remain effective for latency-sensitive workloads.
- Context
- 1.0M
- Max output
- 128K
- Released
- 2026-09-22
- Input
- $4/M
- Output
- $20/M
- Cache read
- $0.2/M
Claude Sonnet 5.5
anthropicClaude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing polished documents, slides, and spreadsheets, and it writes and communicates more clearly than its predecessor. Thinking is always on, so effort is the main lever for trading off depth, latency, and cost, and lower effort settings keep it responsive for everyday agentic loops.
- Context
- 1.0M
- Max output
- 128K
- Released
- 2026-09-28
- Input
- $2/M
- Output
- $10/M
- Cache read
- $0.1/M
Claude Fable 5.1
anthropicClaude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual code generation, and finance and analysis tasks in particular. It also tends to be more concise than Fable 5 in its plans and summaries. We recommend testing it as a direct upgrade wherever you use Fable 5 today, and alongside Opus 5 on reasoning-heavy tasks.
- Context
- 1.0M
- Max output
- 128K
- Released
- 2026-09-01
- Input
- $10/M
- Output
- $50/M
- Cache read
- $0.25/M