GPT-5.3 Codex vs GPT-5.4

Compare OpenAI and OpenAI AI models

OpenAI

GPT-5.3 Codex

OpenAI

GPT-5.4

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Cost Comparison (1000 input + 500 output tokens, 100 requests/day)

GPT-5.3 Codex

Per Request:$0.008750

Daily:$0.875

Monthly:$26.25

Yearly:$319.375

GPT-5.4

Per Request:$0.01

Daily:$1.00

Monthly:$30.00

Yearly:$365.00

Cost Differences

+$0.001250

Per Request

+$0.125

Daily

+$3.75

Monthly

+$45.625

Yearly

GPT-5.4 costs more than GPT-5.3 Codex

Feature Comparison

Feature	GPT-5.3 Codex	GPT-5.4
Provider	OpenAI	OpenAI
Input Price	$1.75/1M tokens	$2.50/1M tokens
Output Price	$14.00/1M tokens	$15.00/1M tokens
Context Window	256,000 tokens	1,050,000 tokens
Max Output	32,768 tokens	131,072 tokens
Category	coding	flagship
Capabilities	textcode	textvisioncodereasoning
Release Date	3/1/2026	3/6/2026

GPT-5.3 Codex vs GPT-5.4: Which Should You Choose?

Choosing between GPT-5.3 Codex and GPT-5.4 depends on your priorities: cost efficiency, context length, or raw capability. GPT-5.3 Codex is the more affordable option at $1.75/1M input tokens — 30% cheaper than GPT-5.4. Meanwhile, GPT-5.4 offers a significantly larger context window at 1,050,000 tokens vs 256,000 for GPT-5.3 Codex.

These models target different tiers: GPT-5.3 Codex is a coding model while GPT-5.4 is flagship. This means they're optimized for different workloads. GPT-5.4 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 $15.00 for GPT-5.4. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. GPT-5.3 Codex has the edge here at $14.00/1M output tokens.

Multimodal capabilities: GPT-5.4 supports vision (image inputs) while GPT-5.3 Codex is text-only. If your application needs image understanding, this narrows your choice.

Best Use Cases

Choose GPT-5.3 Codex when:

• Budget is a primary concern
• You're already using OpenAI's API ecosystem

Choose GPT-5.4 when:

• You need a larger context window (1,050,000 tokens)
• You need more capabilities (vision, reasoning)
• You need longer outputs (up to 131,072 tokens)
• You're already using OpenAI's API ecosystem

Try Different Scenarios

Use the calculator below to see how costs change with different usage patterns

GPT-5.3 Codex (OpenAI)

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GPT-5.4 (OpenAI)

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Frequently Asked Questions

Which is cheaper, GPT-5.3 Codex or GPT-5.4?▼

GPT-5.3 Codex is cheaper for input tokens at $1.75 per million tokens vs $2.50 for GPT-5.4 — that's 30% savings on input costs.

What is the context window difference between GPT-5.3 Codex and GPT-5.4?▼

GPT-5.3 Codex supports 256,000 tokens while GPT-5.4 supports 1,050,000 tokens — a difference of 794,000 tokens in favor of GPT-5.4.

Which model is better for AI Chatbot?▼

Both models support text. For ai chatbot, GPT-5.3 Codex is the lower-cost option, while GPT-5.4 offers a larger context window (1,050,000 vs 256,000 tokens). Choose GPT-5.3 Codex for budget sensitivity or GPT-5.4 for longer context tasks.

Which model has better overall pricing for heavy usage?▼

At 100 requests/day with 1,000 input and 500 output tokens each, GPT-5.3 Codex costs about $26.25/month and GPT-5.4 costs about $30.00/month. Overall, GPT-5.3 Codex has lower combined input + output rates ($1.75 in, $14.00 out) vs GPT-5.4.