Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)
In this head-to-head showdown, Claude Opus 4.8 is more budget-friendly at $25/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.
3 benchmarks evaluated across capability, speed, and cost
Prior Opus generation still billed at $5/$25. Kept as a compare baseline against Opus 5.
Auto-discovered from OpenRouter (openai/gpt-5.5-pro). Preview until a second source matches.
Currently comparing Claude Opus 4.8 vs OpenAI: GPT-5.5 Pro. Alternative family tiers available.
Simulate accuracy gains vs added response time & token cost
Reasoning models “think before answering” by generating internal reasoning tokens. Higher effort improves math, coding, and logic accuracy, but increases response delay and token costs.
Single model data
No latency data
$25 / 1M output
Relative percentile scores computed across all active models in the benchmark catalog.
Comparing top standard models across 6 key capability dimensions. Tap any spoke or dot to inspect.
Category wins across reasoning intelligence, generation speed, and token cost.
Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy
Generation throughput and time to first token responsiveness
Cost per million tokens and max context window length
| Benchmark | Claude Opus 4.8 | OpenAI: GPT-5.5 Pro | Advantage Delta |
|---|---|---|---|
| Preference Elo | — | — | |
| Coding Elo | — | — | |
| LiveBench | — | — | |
| SWE-bench | — | — | |
| GPQA Diamond | — | — | |
| Time to first token | — | — | |
| Output speed | 66 tok/s | — | — |
| Input price | +$25/1M | ||
| Output price | $180/1M | +$155/1M | |
| Context window | +50k |
Simulate monthly production API costs in USD (US Dollar).
Claude Opus 4.8 is estimated to save $3,200.00/month ($38,400/year).
Need SWE-bench on both sides.
Lower output list price ($25/1M).
Need TTFT on both sides.
Larger window (1.1M).
Claude Opus 4.8 is the side marked multimodal in the catalog.
| Target Workload | Recommended Pick | Evaluation Rationale |
|---|---|---|
| Repo / coding agents | insufficient data | Need SWE-bench on both sides. |
| High-volume chat | Claude Opus 4.8 | Lower output list price ($25/1M). |
| Voice / low-latency UI | insufficient data | Need TTFT on both sides. |
| Long-document RAG | OpenAI: GPT-5.5 Pro | Larger window (1.1M). |
| Screenshots / vision | Claude Opus 4.8 | Claude Opus 4.8 is the side marked multimodal in the catalog. |
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Verified Head-to-Head Telemetry
