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.
 GPT-5 Codex |  Nova Premier 1.0 | |
|---|---|---|
Model Provider The organization behind this AI's development | OpenAI | Amazon |
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.
| GPT-5 Codex | Nova Premier 1.0 | |
|---|---|---|
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.
| GPT-5 Codex | 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.
GPT-5 Codex 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. Includes built-in content moderation for safer outputs. Released September 23rd, 2025.Nova Premier 1.0 by Amazon understands both text and images, can use external tools and APIs. It can handle standard conversations with its 1M token context window. Reasonably priced at $2.50/M input and $12.50/M output tokens. Includes built-in content moderation for safer outputs. Released October 31st, 2025.Explore More Comparisons
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Compare Nova Premier 1.0 with:
🚀Programming
Best models for coding and development
🎨Creative & Roleplay
Models optimized for creative writing
📢Marketing
Content creation and marketing tasks
💻Technology
Technical analysis and explanations
🔬Science
Scientific research and analysis
🌐Translation
Multilingual translation tasks