OpenRouter · Frontier tier

Top Smartest AI Models

A curated ranking of the strongest frontier reasoning models available on OpenRouter, with their key specifications and token pricing. Prices are shown per 1,000,000 tokens (input / output).

1

OpenAI · GPT-5.5 Pro

openai/gpt-5.5-pro

Context
1.05M tokens
Max output
128K tokens
Inputs
Text · Image · File
Knowledge
Dec 2025
ReasoningTool use
$30.00
Input / 1M
$180.00
Output / 1M
2

Anthropic · Claude Opus 5

anthropic/claude-opus-5

Context
1M tokens
Max output
128K tokens
Inputs
Text · Image · File
Knowledge
—
ReasoningTool use
$5.00
Input / 1M
$25.00
Output / 1M
3

Google · Gemini 3.1 Pro

google/gemini-3.1-pro-preview

Context
1.05M tokens
Max output
64K tokens
Inputs
Text · Image · Audio · Video · File
Knowledge
—
ReasoningTool useFully multimodal
$2.00
Input / 1M
$12.00
Output / 1M
4

OpenAI · o3 Pro

openai/o3-pro

Context
200K tokens
Max output
100K tokens
Inputs
Text · Image · File
Knowledge
Jun 2024
ReasoningTool use
$20.00
Input / 1M
$80.00
Output / 1M
5

Anthropic · Claude Fable 5

anthropic/claude-fable-5

Context
1M tokens
Max output
128K tokens
Inputs
Text · Image · File
Knowledge
—
ReasoningTool use
$10.00
Input / 1M
$50.00
Output / 1M
6

OpenAI · GPT-5.5

openai/gpt-5.5

Context
1.05M tokens
Max output
128K tokens
Inputs
Text · Image · File
Knowledge
Dec 2025
ReasoningTool use
$5.00
Input / 1M
$30.00
Output / 1M
7

xAI · Grok 4.6

x-ai/grok-4.6

Context
500K tokens
Max output
—
Inputs
Text · Image · File
Knowledge
—
ReasoningTool use
$2.00
Input / 1M
$6.00
Output / 1M
8

Qwen · Qwen3.8 Max

qwen/qwen3.8-max

Context
1M tokens
Max output
131K tokens
Inputs
Text · Image · Video
Knowledge
—
ReasoningTool use
$2.00
Input / 1M
$6.00
Output / 1M
9

Meta · Muse Spark 1.2

meta/muse-spark-1.2

Context
1.05M tokens
Max output
—
Inputs
Text · Image · Audio · Video · File
Knowledge
—
ReasoningTool useFully multimodal
$1.25
Input / 1M
$4.25
Output / 1M
10

DeepSeek · V4 Pro

deepseek/deepseek-v4-pro-0813

Context
1.05M tokens
Max output
—
Inputs
Text
Knowledge
—
ReasoningTool use
$1.12
Input / 1M
$3.37
Output / 1M

Specs and pricing sourced from the OpenRouter models API (openrouter.ai/api/v1/models) on 2026-08-24. Ranking reflects a curated view of frontier reasoning capability, not a strict benchmark score. Pricing is per 1,000,000 tokens and may change.