GPT-5.4 vs GPT-5.5
Pricing, benchmarks, and use case comparison
Quick take
- •GPT-5.4 is meaningfully stronger at cost efficiency (72 vs 58 on our capability index).
- •GPT-5.4 is 50% cheaper on input tokens, which compounds fast on high-volume or agentic workloads.
Specs comparison
| GPT-5.4 | GPT-5.5 | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Type | Closed source | Closed source |
| Context window | 1,050,000 tokens (128,000 max output) | 1,050,000 tokens (128,000 max output) |
| Input / 1M tokens | ✓$2.50 | $5.00 |
| Output / 1M tokens | $15.00 | $30.00 |
| Release date | 2026-03 | 2026-04 |
Benchmarks
| Benchmark | GPT-5.4 | GPT-5.5 |
|---|---|---|
| SWE-bench Verified | - | 82.6% |
| SWE-bench Pro | - | 58.6% |
Scores sourced from official provider release posts and independent benchmark aggregators.
Which should you choose?
Choose GPT-5.4 if...
- →Large-context tasks where GPT-5.5-level frontier reasoning is not required
- →Cost-conscious production workloads that still need strong capability
- →Migrating from GPT-5.4-based systems where behavior is already tuned
Choose GPT-5.5 if...
- →Complex professional coding, data analysis, and multi-tool agentic workflows
- →Long-document or large-codebase tasks needing a 1M+ context window
- →You want OpenAI's recommended default frontier model for new projects