Kimi K3.1 Pro vs Claude Fable 5.2
Compare Kimi K3.1 Pro and Claude Fable 5.2 side-by-side. See comparisons of price, response speed, accuracy, and file support to choose the best model for your task.
Overview
Kimi K3.1 Pro vs Claude Fable 5.2 Overview
Everything you need to know about these AI models, including capabilities, performance, pricing, and technical details.
Kimi / Kimi K3.1 Pro
proDescription
Moonshot AI's newest flagship and the first model in its K3.1 series, built as a post-trained upgrade to Kimi K3. Moonshot reports Terminal-Bench 4.0 results just behind Claude Opus 5.5, a top OfficeQA Pro v2 score, and far fewer factual errors than K3. It reads text and images across a very large context and reasons before answering. Moonshot is releasing open weights.
Anthropic / Claude Fable 5.2
maxDescription
Anthropic's most capable model and the upgrade to Fable 5.1. Anthropic reports it is a step above Opus 5.5 in almost every area it tested, with large gains in coding and chart reading, and output up to 30% faster than Fable 5.1. It reads text, images, and files across a very large context, supports web search, and offers effort from Low to Max.
About
About
Capabilities
Capabilities
Comparison
Why Use Kimi K3.1 Pro and Claude Fable 5.2?
Aymo gives you more than access to individual models—it provides a complete multi-model AI workspace designed for productivity.
Kimi / Kimi K3.1 Pro
proClose To Opus 5.5
Moonshot reports 65.7% on Terminal-Bench 4.0, just behind Claude Opus 5.5 at 66.4% and ahead of GPT-6 Astra at 58.2%. These are Moonshot's own results.
Reasoning Built In
Reasons through each request before it replies. Moonshot reports 61.2% on its long-horizon coding test, up from 55.95% for Kimi K3, after much larger post-training.
Room For Long Inputs
A very large context window of about 1 million tokens, according to Moonshot. Load a full repository, long filings, or a research set in one request.
Finance And Office Work
Moonshot reports a top score of 64.4 on OfficeQA Pro v2, and a rise in Financial Research from 58.8 to 70.4 over Kimi K3 on its internal tests.
Fewer Factual Errors
On Moonshot's hardest accuracy test, claim-level errors fell from 23.4% with Kimi K3 to 8.3%. It has no native web search, so current data comes through connected tools.
Text And Image Input
Reads text and images on Aymo. Moonshot also built it for 3D work from sketches and reference images, scoring 72.8 on BenchCAD without tools, level with Claude Opus 5.5.
Anthropic / Claude Fable 5.2
maxTop FrontierCode Score
Anthropic reports 49.1% on FrontierCode 2.0 at Xhigh effort, up from 32.4% for Fable 5.1. That is the highest score of any released model Anthropic tested.
Effort Low To Max
Effort runs Low, Medium, High, Xhigh, and Max, with Medium as the default. At Medium, Anthropic reports it finishes hard tasks with fewer tokens than Fable 5.1.
Room For Whole Projects
A very large context window on Aymo, with room for a full codebase or a long document set. Load everything once and work across it in one session.
Expert Technical Work
Anthropic built Fable for its most ambitious, open-ended technical work. It can also act as an advisor to smaller models or hand simpler tasks to them.
Fewer Needless Refusals
Supports web search on Aymo. Anthropic reports about 55% fewer blocked legitimate requests than Fable 5.1, with similar protection against cyber and biology risks.
Text, Image, And Files
Reads text and images, plus files you upload on Aymo. On Chartography, a chart-reading test without tools, Anthropic reports 73.4%, up from 44.8% for Fable 5.1.
Why Aymo
Why chat with Kimi K3.1 Pro and Claude Fable 5.2 on Aymo AI?
Aymo gives you more than access to Kimi K3.1 Pro and Claude Fable 5.2—it provides a complete multi-model AI workspace designed for productivity.
Compare Responses
See how Kimi K3.1 Pro and Claude Fable 5.2 performs alongside Claude, Gemini, Grok, and other leading AI models.
One Workspace
Keep all your AI conversations, files, and prompts in a single organized workspace.
Switch Models Instantly
Move between different AI models without restarting your conversation.
Upload Once
Use the same files across multiple AI models without uploading them again.
Save & Organize
Bookmark important chats, organize projects, and return anytime.
Work Together
Share conversations and collaborate with teammates in one place.