GPT-5.1-Codex-Max vs Skyfall 36B V2 (Comparative Analysis)
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Comparative Analysis: GPT-5.1-Codex-Max vs. Skyfall 36B V2
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Overview
Skyfall 36B V2 was released 8 months before GPT-5.1-Codex-Max.
 GPT-5.1-Codex-Max |  Skyfall 36B V2 | |
|---|---|---|
Model Provider The organization behind this AI's development | OpenAI | TheDrummer |
Input Context Window Maximum input tokens this model can process at once | 400K tokens | 32.8K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 128K tokens | 32.8K tokens |
Release Date When this model first became publicly available | December 4, 2025 8 months ago December 4th, 2025 | March 10, 2025 1 year ago March 10th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | Not reported | June 30, 2024 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
GPT-5.1-Codex-Max | Skyfall 36B V2 | |
|---|---|---|
Input Types Supported input formats | 📝Text🖼️Image | 📝Text |
Reasoning Controls Defaults and configurable reasoning effort | Always enabledEffort: Extra High, High, Medium, LowDefault: Medium | Not reported |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | GPT | Other |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation | Function Calling✓Structured OutputReasoning ModeContent Moderation |
Open Source Model availability | Proprietary | Available on HuggingFace → |
Pricing
GPT-5.1-Codex-Max is roughly 2.3x more expensive compared to Skyfall 36B V2 for input tokens and roughly 12.5x more expensive for output tokens.
| GPT-5.1-Codex-Max | Skyfall 36B V2 | |
|---|---|---|
Input Token Cost Cost per million input tokens | $1.25 per million tokens | $0.55 per million tokens |
Output Token Cost Cost per million output tokens | $10.00 per million tokens | $0.80 per million tokens |
Web Search Cost Additional cost for each web search operation | $0.01 per search | Not specified |
Cache Read Cost Cost to reuse cached input tokens | $0.13 per million tokens | $0.25 per million tokens |
At a Glance
Quick overview of what makes GPT-5.1-Codex-Max and Skyfall 36B V2 unique.
GPT-5.1-Codex-Max by OpenAI understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 400K token context window. Reasonably priced at $1.25/M input and $10.00/M output tokens. Released December 4th, 2025.Skyfall 36B V2 by TheDrummer generates structured data. It can handle standard conversations with its 32.8K token context window. Reasonably priced at $0.55/M input and $0.80/M output tokens. Released March 10th, 2025.Explore More Comparisons
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