token.app › Compare › GPT-5.4 vs GPT-5.6 Terra
GPT-5.4 vs GPT-5.6 Terra
GPT-5.6 Terra leads on 4 of 5 shared benchmarks. GPT-5.6 Terra is 2.5× cheaper per token on a blended 3:1 basis.
Head to head
Blended price uses a 3:1 input:output mix
| GPT-5.4 | GPT-5.6 Terra | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input $/1M | $2.50 | $1.00 |
| Output $/1M | $15.00 | $6.00 |
| Blended $/1M | $5.63 | $2.25 |
| Context window | 1.1M | 1.1M |
| Max output | 128K | 128K |
| Released | Mar 2026 | Jul 2026 |
| Licence | Proprietary | Proprietary |
| GPQA Diamond | 93.3% | 93.3% |
| FrontierMath T1–3 | 78.6% | 86.0% |
| FrontierMath T4 | 49.0% | 70.7% |
| SimpleQA Verified | 44.8% | 43.1% |
| OTIS Mock AIME | 97.8% | 99.7% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose GPT-5.4 if…
- Higher SimpleQA Verified (44.8% vs 43.1%)
Choose GPT-5.6 Terra if…
- Costs less per token — $2.25 vs $5.63 blended
- Higher GPQA Diamond (93.3% vs 93.3%)
- Higher FrontierMath T1–3 (86.0% vs 78.6%)
- Higher FrontierMath T4 (70.7% vs 49.0%)
- Higher OTIS Mock AIME (99.7% vs 97.8%)
- Newer model (released Jul 2026)
FAQ
Which is better, GPT-5.4 or GPT-5.6 Terra?
Across the 5 benchmarks both models have independently-run scores for, GPT-5.4 leads on 1 and GPT-5.6 Terra leads on 4. Benchmarks are one input — price and context window are on this page too.
Is GPT-5.4 cheaper than GPT-5.6 Terra?
GPT-5.6 Terra is cheaper: $2.25 versus $5.63 per million tokens blended at 3:1 input:output. Input alone: $2.50 vs $1.00. Output alone: $15.00 vs $6.00.
What context windows do GPT-5.4 and GPT-5.6 Terra have?
GPT-5.4: 1,050,000 tokens. GPT-5.6 Terra: 1,050,000 tokens.
Who makes GPT-5.4 and GPT-5.6 Terra?
GPT-5.4 is made by OpenAI. GPT-5.6 Terra is made by OpenAI.