GPT-5 Codex vs Nova Premier 1.0 (Comparative Analysis)
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Comparative Analysis: GPT-5 Codex vs. Nova Premier 1.0
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Overview
GPT-5 Codex was released 1 month before Nova Premier 1.0.
Model Provider The organization behind this AI's development | ||
Input Context Window Maximum input tokens this model can process at once | 400K tokens | 1M tokens |
Output Token Limit Maximum output tokens this model can generate at once | 128K tokens | 32K tokens |
Release Date When this model first became publicly available | September 23, 2025 10 months ago September 23rd, 2025 | October 31, 2025 8 months ago October 31st, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | September 30, 2024 | Not reported |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
GPT-5 Codex | Nova Premier 1.0 | |
|---|---|---|
Input Types Supported input formats | 📝Text🖼️Image | 📝Text🖼️Image |
Reasoning Controls Defaults and configurable reasoning effort | Always enabled | Not reported |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | GPT | Nova |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation | ✓Function CallingStructured OutputReasoning Mode✓Content Moderation |
Pricing
GPT-5 Codex is roughly 0.5x less expensive compared to Nova Premier 1.0 for input tokens and roughly 0.8x less expensive for output tokens.
Input Token Cost Cost per million input tokens | $1.25 per million tokens | $2.50 per million tokens |
Output Token Cost Cost per million output tokens | $10.00 per million tokens | $12.50 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 | $0.63 per million tokens |
Benchmarks
Compare relevant benchmarks between GPT-5 Codex and Nova Premier 1.0.
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,138 Elo (#26 in Webapps (52.4% win rate)) | 860 Elo (#116 in Website (26.2% win rate)) |
At a Glance
Quick overview of what makes GPT-5 Codex and Nova Premier 1.0 unique.
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