GPT-5.3 Codex vs GPT-5.4 nano
Compare OpenAI and OpenAI AI models
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
GPT-5.3 Codex
GPT-5.4 nano
Cost Differences
GPT-5.4 nano costs less than GPT-5.3 Codex
Feature Comparison
| Feature | GPT-5.3 Codex | GPT-5.4 nano |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input Price | $1.75/1M tokens | $0.20/1M tokens |
| Output Price | $14.00/1M tokens | $1.25/1M tokens |
| Context Window | 256,000 tokens | 128,000 tokens |
| Max Output | 32,768 tokens | 8,192 tokens |
| Category | coding | efficient |
| Capabilities | textcode | text |
| Release Date | 3/1/2026 | 3/6/2026 |
GPT-5.3 Codex vs GPT-5.4 nano: Which Should You Choose?
Choosing between GPT-5.3 Codex and GPT-5.4 nano depends on your priorities: cost efficiency, context length, or raw capability. GPT-5.4 nano is the more affordable option at $0.20/1M input tokens — 89% cheaper than GPT-5.3 Codex. Meanwhile, GPT-5.3 Codex offers a significantly larger context window at 256,000 tokens vs 128,000 for GPT-5.4 nano.
These models target different tiers: GPT-5.3 Codex is a coding model while GPT-5.4 nano is efficient. This means they're optimized for different workloads. GPT-5.4 nano targets more demanding workloads, while GPT-5.3 Codex provides a cost-effective option for everyday tasks.
Output costs matter too. GPT-5.3 Codex charges $14.00/1M output tokens vs $1.25 for GPT-5.4 nano. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. GPT-5.4 nano has the edge here at $1.25/1M output tokens.
Best Use Cases
Choose GPT-5.3 Codex when:
- • You need a larger context window (256,000 tokens)
- • You need more capabilities (code)
- • You need longer outputs (up to 32,768 tokens)
- • You're already using OpenAI's API ecosystem
Choose GPT-5.4 nano when:
- • Budget is a primary concern
- • You're already using OpenAI's API ecosystem
- • You're running high-volume, latency-sensitive workloads
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
GPT-5.3 Codex (OpenAI)
GPT-5.4 nano (OpenAI)
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