stack-reasoning.stack.json json Copy{
"osr": "1",
"kind": "stack",
"name": "Reasoning models",
"description": "Models with extended thinking for multi-step problems, the strongest preferred for hard requests.",
"targets": [
{
"ocm": "1",
"id": "model-openai-gpt-5-3-codex",
"kind": "llm",
"name": "GPT-5.3-Codex",
"description": "GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...",
"publisher": "OpenAI",
"version": "1.0.0",
"capabilities": {
"domains": [
"general"
],
"tags": [
"llm",
"openai",
"openrouter",
"reasoning",
"tool-calling",
"image",
"file",
"models"
],
"languages": [
"en"
],
"modalities": [
"text",
"image",
"file"
],
"supports_tools": true,
"supports_streaming": true,
"context_window": 400000
},
"quality_prior": 0.6,
"examples": [
"GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results..."
],
"primary": false,
"metadata": {
"source": {
"provider": "models",
"ref": "1771959164",
"url": "https://openrouter.ai/openai/gpt-5.3-codex",
"key": "openai/gpt-5.3-codex",
"catalogue": "https://openrouter.ai/api/v1"
},
"model": "openai/gpt-5.3-codex",
"pricing": {
"input_usd_per_1m": 1.75,
"output_usd_per_1m": 14,
"cache_read_usd_per_1m": 0.175
},
"max_output_tokens": 128000,
"output_modalities": [
"text"
],
"reasoning": true,
"created": 1771959164
},
"cost": {
"usd_per_1k_tokens": 0.007875
},
"endpoints": [
{
"protocol": "openai",
"url": "https://openrouter.ai/api/v1"
}
]
},
{
"ocm": "1",
"id": "model-openai-gpt-5-2-codex",
"kind": "llm",
"name": "GPT-5.2-Codex",
"description": "GPT-5.2-Codex is an upgraded version of GPT-5.1-Codex optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....",
"publisher": "OpenAI",
"version": "1.0.0",
"capabilities": {
"domains": [
"general"
],
"tags": [
"llm",
"openai",
"openrouter",
"reasoning",
"tool-calling",
"image",
"models"
],
"languages": [
"en"
],
"modalities": [
"text",
"image"
],
"supports_tools": true,
"supports_streaming": true,
"context_window": 400000
},
"quality_prior": 0.6,
"examples": [
"GPT-5.2-Codex is an upgraded version of GPT-5.1-Codex optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks...."
],
"primary": false,
"metadata": {
"source": {
"provider": "models",
"ref": "1768409315",
"url": "https://openrouter.ai/openai/gpt-5.2-codex",
"key": "openai/gpt-5.2-codex",
"catalogue": "https://openrouter.ai/api/v1"
},
"model": "openai/gpt-5.2-codex",
"pricing": {
"input_usd_per_1m": 1.75,
"output_usd_per_1m": 14,
"cache_read_usd_per_1m": 0.175
},
"max_output_tokens": 128000,
"output_modalities": [
"text"
],
"reasoning": true,
"created": 1768409315
},
"cost": {
"usd_per_1k_tokens": 0.007875
},
"endpoints": [
{
"protocol": "openai",
"url": "https://openrouter.ai/api/v1"
}
]
},
{
"ocm": "1",
"id": "model-openai-gpt-5-2",
"kind": "llm",
"name": "GPT-5.2",
"description": "GPT-5.2 is the latest frontier-grade model in the GPT-5 series, offering stronger agentic and long context perfomance compared to GPT-5.1. It uses adaptive reasoning to allocate computation dynamically, responding quickly...",
"publisher": "OpenAI",
"version": "1.0.0",
"capabilities": {
"domains": [
"general"
],
"tags": [
"llm",
"openai",
"openrouter",
"reasoning",
"tool-calling",
"file",
"image",
"models"
],
"languages": [
"en"
],
"modalities": [
"file",
"image",
"text"
],
"supports_tools": true,
"supports_streaming": true,
"context_window": 400000
},
"quality_prior": 0.6,
"examples": [
"GPT-5.2 is the latest frontier-grade model in the GPT-5 series, offering stronger agentic and long context perfomance compared to GPT-5.1. It uses adaptive reasoning to allocate computation dynamically, responding quickly..."
],
"primary": false,
"metadata": {
"source": {
"provider": "models",
"ref": "1765389775",
"url": "https://openrouter.ai/openai/gpt-5.2",
"key": "openai/gpt-5.2",
"catalogue": "https://openrouter.ai/api/v1"
},
"model": "openai/gpt-5.2",
"pricing": {
"input_usd_per_1m": 1.75,
"output_usd_per_1m": 14,
"cache_read_usd_per_1m": 0.175
},
"max_output_tokens": 128000,
"output_modalities": [
"text"
],
"reasoning": true,
"created": 1765389775
},
"cost": {
"usd_per_1k_tokens": 0.007875
},
"endpoints": [
{
"protocol": "openai",
"url": "https://openrouter.ai/api/v1"
}
]
},
{
"ocm": "1",
"id": "model-openai-gpt-5-4-image-2",
"kind": "llm",
"name": "GPT-5.4 Image 2",
"description": "[GPT-5.4](https://openrouter.ai/openai/gpt-5.4) Image 2 combines OpenAI's GPT-5.4 model with state-of-the-art image generation capabilities from GPT Image 2. It enables rich multimodal workflows, allowing users to seamlessly move between reasoning, coding, and...",
"publisher": "OpenAI",
"version": "1.0.0",
"capabilities": {
"domains": [
"general"
],
"tags": [
"llm",
"openai",
"openrouter",
"reasoning",
"image",
"file",
"models"
],
"languages": [
"en"
],
"modalities": [
"image",
"text",
"file"
],
"supports_tools": false,
"supports_streaming": true,
"context_window": 272000
},
"quality_prior": 0.6,
"examples": [
"[GPT-5.4](https://openrouter.ai/openai/gpt-5.4) Image 2 combines OpenAI's GPT-5.4 model with state-of-the-art image generation capabilities from GPT Image 2. It enables rich multimodal workflows, allowing users to seamlessly move between reasoning, coding, and..."
],
"primary": false,
"metadata": {
"source": {
"provider": "models",
"ref": "1776797528",
"url": "https://openrouter.ai/openai/gpt-5.4-image-2",
"key": "openai/gpt-5.4-image-2",
"catalogue": "https://openrouter.ai/api/v1"
},
"model": "openai/gpt-5.4-image-2",
"pricing": {
"input_usd_per_1m": 8,
"output_usd_per_1m": 15,
"cache_read_usd_per_1m": 2
},
"max_output_tokens": 128000,
"output_modalities": [
"image",
"text"
],
"reasoning": true,
"created": 1776797528
},
"cost": {
"usd_per_1k_tokens": 0.0115
},
"endpoints": [
{
"protocol": "openai",
"url": "https://openrouter.ai/api/v1"
}
]
}
],
"rules": [
{
"name": "hard-to-strongest",
"when": {
"min_complexity": 0.7
},
"prefer": [
"model-openai-gpt-5-3-codex"
]
}
],
"objective": {
"quality": 0.7,
"cost": 0.8,
"latency": 0.2
},
"metadata": {
"source": {
"provider": "catalogue-stacks",
"path": "reasoning",
"ref": "2026-09-19",
"url": "https://openrouter.ai/models",
"key": "catalogue-stacks/reasoning",
"catalogue": "https://openrouter.ai/api/v1",
"generated": true
}
}
}