Claude Opus 5 vs GPT-5.6 Sol
The two flagship frontier models of July 2026, head to head. Same input price, different output price — compare SWE-bench, ARC-AGI-3, agentic coding, and context windows.
Comparing 2 models · Prices last verified
Verdict
Both charge $5 per million input tokens, but Opus 5 is 17% cheaper on output ($25 vs $30) — and output dominates most bills. Opus 5 leads on SWE-bench Pro (79.2% vs 64.6%), ARC-AGI-3 (30.2% vs 7.8%), Frontier-Bench (43.3% vs 34.4%), OSWorld 2.0 and GDPval-AA v2. GPT-5.6 Sol edges ahead on Terminal-Bench 2.1 and BrowseComp, and offers a slightly larger 1.05M context window plus much faster peak throughput. Opus 5 is the stronger default; Sol wins on raw speed and terminal work.
Pricing Comparison
| Model | Provider | Input / 1M | Output / 1M | Context | Tier |
|---|---|---|---|---|---|
| Claude Opus 5Best value | Anthropic | $5.00 | $25.00 | 1M | flagship |
| GPT-5.6 Sol | OpenAI | $5.00 | $30.00 | 1M | flagship |
Model Breakdown
Anthropic
$5.00
per 1M input
Claude Opus 5 is Anthropic's flagship model, released July 24, 2026. It reaches close to Claude Fable 5's frontier intelligence at half the price, and holds the same $5/$25 per-million pricing as Opus 4.8 while more than doubling its agentic coding score. It tops Frontier-Bench v0.1 (43.3%), ARC-AGI-3 (30.2%, roughly 4x the next best model), and Artificial Analysis' GDPval-AA v2 knowledge-work leaderboard (1,861 Elo). It is also Anthropic's most aligned Opus model to date.
OpenAI
$5.00
per 1M input
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series.
Our Verdict
Both charge $5 per million input tokens, but Opus 5 is 17% cheaper on output ($25 vs $30) — and output dominates most bills. Opus 5 leads on SWE-bench Pro (79.2% vs 64.6%), ARC-AGI-3 (30.2% vs 7.8%), Frontier-Bench (43.3% vs 34.4%), OSWorld 2.0 and GDPval-AA v2. GPT-5.6 Sol edges ahead on Terminal-Bench 2.1 and BrowseComp, and offers a slightly larger 1.05M context window plus much faster peak throughput. Opus 5 is the stronger default; Sol wins on raw speed and terminal work.
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