GPT-5.6 Sol vs Claude Opus 4.6
OpenAI vs Anthropic · Prices checked 12 August 2026
The two are closer than they look: Claude Opus 4.6 at $11.00 per million tokens blended, GPT-5.6 Sol at $12.50, a 12 per cent difference. A single 100K-input, 10K-output job costs $0.750 on Claude Opus 4.6 against $0.800 on GPT-5.6 Sol.
Of the 2 shared benchmarks, GPT-5.6 Sol takes 2. The widest gap is on LMArena Elo, where GPT-5.6 Sol leads by 103 points. On context, GPT-5.6 Sol is the larger at 1,050,000 tokens versus 1,000,000. GPT-5.6 Sol was released Jul 2026; Claude Opus 4.6 Nov 2025.
Pricing and capacity
| Metric | GPT-5.6 Sol | Claude Opus 4.6 | Difference |
|---|---|---|---|
| Input / 1M tokens | $5.00 | $5.00 | level |
| Output / 1M tokens | $30.00 | $25.00 | 17% |
| Blended · 70/30calculated | $12.50 | $11.00 | 12% |
| Blended · 50/50calculated | $17.50 | $15.00 | 14% |
| Blended · 80/20calculated | $10.00 | $9.00 | 10% |
| Blended · 20/80calculated | $25.00 | $21.00 | 16% |
| Job cost · 100K + 10Kcalculated | $0.800 | $0.750 | 6% |
| Job cost · 1M + 100Kcalculated | $8.00 | $7.50 | 6% |
| Context window | 1,050,000 | 1,000,000 | 5% |
Input and output rates are as published by each provider. Blended and job-cost rows are calculated comparison metrics, not published prices — how they are derived.
Benchmarks
| Benchmark | GPT-5.6 Sol | Claude Opus 4.6 | Leader |
|---|---|---|---|
| GPQA Diamond | 94.6% | 79% | GPT-5.6 Sol |
| LMArena Elo | 1481 Elo | 1378 Elo | GPT-5.6 Sol |
Only suites both models report are listed, so a missing score is never shown as a loss. Figures are provider-published or from public leaderboards and are not independently re-run.
What each model is for
GPT-5.6 Sol
OpenAI · Frontier
The flagship tier of the GPT-5.6 family, aimed at complex reasoning, long-horizon agentic work, coding, biology and cybersecurity. In OpenAI's naming the number is the generation and Sol is a durable capability tier, so Sol advances on its own cadence rather than being replaced by the next decimal. Standard short-context pricing is $5/$30 per MTok with cached input at $0.50; requests above 272K tokens are billed at the long-context rate of $10/$45.
- Frontier reasoning
- Long-horizon agentic execution
- Coding and code review
- Programmatic tool calling in the Responses API
Claude Opus 4.6
Anthropic · Previous
The flagship of the Claude 4 generation. 1M-token context is GA, and Opus 4.6 leads on agentic coding, long-horizon reasoning and tool-use reliability.
- Agentic coding (Claude Code)
- 1M-token context, GA
- Tool use & function calling
- Multi-step reasoning
Frequently asked questions
Which is cheaper, GPT-5.6 Sol or Claude Opus 4.6?
The two are closer than they look: Claude Opus 4.6 at $11.00 per million tokens blended, GPT-5.6 Sol at $12.50, a 12 per cent difference. A single 100K-input, 10K-output job costs $0.750 on Claude Opus 4.6 against $0.800 on GPT-5.6 Sol. Blended cost weights input at 70% and output at 30%; price your own token split for an exact answer, since the cheaper model on a blended basis is not always cheaper for your workload.
Which performs better, GPT-5.6 Sol or Claude Opus 4.6?
Of the 2 shared benchmarks, GPT-5.6 Sol takes 2. The widest gap is on LMArena Elo, where GPT-5.6 Sol leads by 103 points. These are the figures each provider or public leaderboard publishes, not results we re-run, and a benchmark average can hide the specific behaviour your workload depends on.
Which has the larger context window, GPT-5.6 Sol or Claude Opus 4.6?
On context, GPT-5.6 Sol is the larger at 1,050,000 tokens versus 1,000,000. The context window caps everything in a single request: prompt, retrieved documents, conversation history and the model’s own output all share it.
Can I compare GPT-5.6 Sol and Claude Opus 4.6 on my own numbers?
Yes. Open both in the side-by-side comparison tool to see every field at once, or use the token calculator to price your actual prompt and monthly request volume against each model. Both are free and need no sign-up.
Price it for your own workload
Related matchups
Terms used on this page
Prices and scores are recomputed on every deploy from the catalogue. Prices checked 12 August 2026.