Compare models

Put up to 4 models beside each other — token prices, context windows, capabilities and provider, from the same catalogue the model pages read.

Kimi K3.1 ProMoonShot AI Remove
Claude Fable 5.2Anthropic Remove
Gemini 4 CarbonGoogle Remove
S1Fish Audio Remove

4 is the maximum. Remove one to add another.

kimi-k3.1-pro vs claude-fable-5.2 vs gemini-4-carbon vs s1
Attribute	Kimi K3.1 Prokimi-k3.1-pro	Claude Fable 5.2claude-fable-5.2	Gemini 4 Carbongemini-4-carbon	S1s1
Pricing
Input	$2.00 / 1M	$8.00 / 1M	$2.00 / 1M	— Not priced per input token
Output	$10.00 / 1M	$40.00 / 1M	$10.00 / 1M	— Not priced per output token
Cache Write (5m)	$2.00 / 1M	$10.00 / 1M	$2.00 / 1M	Not applicable
Cache Write (1h)	$2.00 / 1M	$16.00 / 1M	$2.00 / 1M	Not applicable
Cache Read	$2.00 / 1M	$0.20 / 1M	$2.00 / 1M	Not applicable
Web Search	$0 / 1M	$0 / 1M	$0 / 1M	$0 / 1M
Context
Max context	1M	1M	1M	N/A
Max output	N/A	N/A	N/A	N/A
Capabilities
Vision	Yes	Yes	Yes	No
Function Calling	Yes	Yes	Yes	No
JSON Mode	Yes	Yes	Yes	No
Streaming	Yes	Yes	Yes	No
Catalogue
Provider	MoonShot AI	Anthropic	Google	Fish Audio
Category	chat	chat	chat	voice
Charge type	Pay As You Go	Pay As You Go	Pay As You Go	Pay As You Go
Released	—	—	—	2026-07-29
Description
Summary	Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model, building on Kimi K3 with enhanced post-training for advanced reasoning and autonomous task execution. It features a 1M-token context window and native image and video understanding, enabling complex, long-context multimodal workflows. Optimized for long-horizon coding, 3D creation, financial research, and end-to-end agentic knowledge work, Kimi K3.1 Pro is well suited for autonomous software engineering, multimodal analysis, and complex professional workflows that require sustained reasoning and reliable execution.	Claude Fable 5.2 is Anthropic's most capable model for advanced technical work and open-ended problem solving, delivering significant improvements in coding, reasoning, and vision over Fable 5.1. It excels at exceptionally complex tasks, including large-scale software migrations, electronic system design, and advanced scientific and mathematical research. With up to 30% faster output generation, clearer communication, and always-on adaptive extended thinking, Fable 5.2 supports configurable reasoning effort from low to max (default high), with thinking preserved across turns. Designed for frontier engineering, scientific discovery, and ambitious long-horizon agentic workflows, it complements Opus 5.5 as a specialized option for the most demanding technical challenges.	Gemini 4 Carbon is Google's frontier multimodal reasoning model, designed for advanced coding, agentic workflows, and complex multi-step problem solving. It supports text, image, audio, video, and file inputs, enabling integrated reasoning and analysis across diverse modalities. Optimized for long-horizon execution and demanding professional workloads, Gemini 4 Carbon supports up to 1M output tokens through continuation and configurable reasoning effort levels (low, medium, high) to balance reasoning depth, latency, and cost. It is well suited for autonomous agents, software engineering, multimodal analysis, and large-scale workflow automation.	Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.