$ diff claude-opus-5 gpt-5-6-sol
Claude Opus 5 vs GPT-5.6 Sol
Anthropic and OpenAI, side by side. Every value below is the one recorded on the model’s own wiki page, with its citation — nothing is estimated.
AnthropicClaude Opus 5
- context
- 1M
- weights
- closed
- $/M in
- $5
- $/M out
- $25
- context
- 1.1M
- weights
- closed
- $/M in
- $5
- $/M out
- $30
What actually differs
- Context window
- GPT-5.6 Sol takes 1.1M against 1M — modestly more room in a single request.
- Output price
- Claude Opus 5 at $25/M against $30/M — 1.2× cheaper to generate. Output dominates the bill on most agentic workloads, where the model writes far more than it reads.
- Recency
- Claude Opus 5 shipped 15 days after GPT-5.6 Sol (2026-07-24 vs 2026-07-09).
Full spec
| Attribute | Claude Opus 5 | GPT-5.6 Sol |
|---|---|---|
| Developer | Anthropic | OpenAI |
| Released | 2026-07-24 | 2026-07-09 |
| Context window | 1M tokens | 1.05M tokens |
| Pricing | $5/M input · $25/M output (standard); $10/M · $50/M (Fast mode, research preview) | $5/M input · $30/M output (Sol; family tiers below) |
| License | proprietary | proprietary (API-only; no weight release) |
| Availability | Claude.ai, API (`claude-opus-5`), Bedrock (`anthropic.claude-opus-53`), Vertex AI, Microsoft Foundry, Claude Code, Cowork | ChatGPT (subscription), API |
Values come from Claude Opus 5 and GPT-5.6 Sol, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing. How these pages are produced.