Claude Opus 4.8 vs GPT-5.6 Sol

Side-by-side comparison. Updated 2026-07-09.

Summary

Compare Claude Opus 4.8 and GPT-5.6 Sol across pricing, context window, modalities, strengths, weaknesses, and best-fit workloads.

Use the details below to weigh cost, context, modalities, and workload fit.

Claude Opus 4.8
by Anthropic
Input pricing
$15.00 /1M input tokens
Full review →
GPT-5.6 Sol
by OpenAI
Input pricing
$5.00 /1M input tokens
Full review →

At a Glance

Side-by-side comparison of Claude Opus 4.8 and GPT-5.6 Sol
Attribute Claude Opus 4.8 GPT-5.6 Sol
Provider Anthropic OpenAI
Tags Intelligent Reasoning Agentic Multimodal Agentic Coding Intelligent Long Context Reasoning
Context 1,000,000 tokens 1,050,000 tokens
Input price $15.00/1M $5.00/1M
Output price $75.00/1M $30.00/1M
Input modalities Text Text
Output modalities Text Text

Claude Opus 4.8 Strengths

  • Top-tier coding and reasoning benchmarks
  • 1M token context window
  • Strong agentic workflow support
  • Wide cloud provider availability

GPT-5.6 Sol Strengths

  • Terminal-Bench 2.1 SOTA (91.9% in Ultra mode)
  • Ultra multi-agent mode coordinates parallel sub-agents for complex tasks
  • 1.05M-token context for long-horizon agentic work
  • Max reasoning-effort control for deeper single-pass reasoning
  • New predictable prompt-caching with explicit cache controls