Claude Opus 4.8 vs GPT-5.4
Pricing, benchmarks, and use case comparison
Quick take
- •GPT-5.4 is 50% cheaper on input tokens, which compounds fast on high-volume or agentic workloads.
- •Claude Opus 4.8 has a 1M context window vs 1,050,000 tokens (128,000 max output) - better for whole-repo or long-document work.
Specs comparison
| Claude Opus 4.8 | GPT-5.4 | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Type | Closed source | Closed source |
| Context window | ✓1M | 1,050,000 tokens (128,000 max output) |
| Input / 1M tokens | $5.00 | ✓$2.50 |
| Output / 1M tokens | $25.00 | $15.00 |
| Release date | 2026-05 | 2026-03 |
Benchmarks
| Benchmark | Claude Opus 4.8 | GPT-5.4 |
|---|---|---|
| SWE-bench Verified | 88.6% | - |
| SWE-bench Pro | 69.2% | - |
| Terminal-Bench 2.1 | 74.6% | - |
| GPQA Diamond | 93.6% | - |
| Artificial Analysis Intelligence Index | 61.4 | - |
Scores sourced from official provider release posts and independent benchmark aggregators.
Which should you choose?
Choose Claude Opus 4.8 if...
- →You need top-tier autonomous coding and multi-step agentic reliability
- →You run long-horizon agent traces that previously derailed after compaction
- →You want enterprise-grade reasoning with 1M context and 128k output
- →You need throughput and are willing to pay fast-mode premium for 2.5x speed
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