GPT-5.4 vs o3
Complete pricing and performance comparison between OpenAI's GPT-5.4 and OpenAI's o3.
Quick Verdict
Cheaper
o3
1.3x cheaper input, 1.9x cheaper output
Larger Context
GPT-5.4
1.1M vs 200K
Higher Quality
GPT-5.4
Score: 57 vs 38
Faster
o3
79 vs 75 tok/s
Pricing Comparison
| Spec | GPT-5.4 | o3 | Difference |
|---|---|---|---|
| Provider | OpenAI | OpenAI | |
| Input / 1M tokens | $2.5 | $2 | o3 is 20% more expensive |
| Output / 1M tokens | $15 | $8 | o3 is 47% more expensive |
| Context Window | 1.1M | 200K | 5x difference |
| Max Output | 128K | 100K |
Performance Benchmarks
| Metric | GPT-5.4 | o3 | Winner |
|---|---|---|---|
| Quality Index | 57 | 38 | GPT-5.4 |
| Output Speed | 75 tok/s | 79 tok/s | o3 |
| Time to First Token | 169.23s | 10.83s | o3 |
| Value (Quality/$) | 22.8 | 19.2 | Higher = better value |
Benchmark data from Artificial Analysis. Quality Index is a composite score across reasoning, coding, and knowledge tasks.
Cost at Scale
Estimated cost at different usage levels (3:1 input-to-output token ratio, typical for chat).
| Usage | GPT-5.4 | o3 | Savings |
|---|---|---|---|
Single request 1K in / 300 out | $0.0070 | $0.0044 | o3 saves $0.0026 |
10 requests 10K in / 3K out | $0.070 | $0.044 | o3 saves $0.026 |
100 requests 100K in / 30K out | $0.700 | $0.440 | o3 saves $0.260 |
1,000 requests 1M in / 300K out | $7.00 | $4.40 | o3 saves $2.60 |
10,000 requests 10M in / 3M out | $70.00 | $44.00 | o3 saves $26.00 |
1M requests/mo 1B in / 300M out | $7000.00 | $4400.00 | o3 saves $2600.00 |
Pros & Cons
GPT-5.4 Strengths
- +Larger context window (1.1M vs 200K)
- +Higher max output tokens
- +Higher quality score (57 vs 38)
o3 Strengths
- +Cheaper input tokens
- +Cheaper output tokens
- +Faster output (79 vs 75 tok/s)
- +Lower latency (faster first token)
When to Use Each Model
Choose GPT-5.4 for
- →Long documents, large codebases, or multi-turn conversations
- →Generating long-form content or detailed code
- →Tasks requiring maximum accuracy and reasoning
Choose o3 for
- →Budget-conscious projects where cost is the primary factor
- →Real-time applications, chat, or autocomplete
Frequently Asked Questions
Which is cheaper, GPT-5.4 or o3?
For input tokens, o3 is 1.3x cheaper at $2/1M tokens. For output tokens, o3 is 1.9x cheaper at $8/1M tokens. At typical usage (1M input + 300K output), GPT-5.4 costs $7.00 vs o3 at $4.40.
What's the context window difference?
GPT-5.4 supports 1.1M context (1,050,000 tokens), while o3 supports 200K (200,000 tokens). GPT-5.4 can handle 5x more context in a single request.
Which model has better benchmarks?
Quality Index: GPT-5.4 scores 57 vs o3 at 38. Speed: GPT-5.4 generates 75 tok/s vs o3 at 79 tok/s. Time to first token: GPT-5.4 at 169.23s vs o3 at 10.83s.
When should I choose GPT-5.4 over o3?
Choose GPT-5.4 when you need: Larger context window (1.1M vs 200K), Higher max output tokens, Higher quality score (57 vs 38). Choose o3 when you need: Cheaper input tokens, Cheaper output tokens, Faster output (79 vs 75 tok/s), Lower latency (faster first token).
How much would 10,000 API requests cost?
At 1K input + 300 output tokens per request (typical chat): GPT-5.4 = $70.00, o3 = $44.00. At 10K input + 1K output per request (longer conversations): GPT-5.4 = $400.00, o3 = $280.00.