Anthropic: Claude Opus 4.8 (batch) vs OpenAI: GPT-5.6 Luna (batch)
Based on weekly OpenRouter usage tracked by AI Tier List, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall — ahead of Anthropic: Claude Opus 4.8 (batch) at #21. OpenAI: GPT-5.6 Luna (batch) is cheaper on input tokens at $0.10/1M vs $2.50/1M for Anthropic: Claude Opus 4.8 (batch). OpenAI: GPT-5.6 Luna (batch) offers the larger context window at 1.1M tokens.
Anthropic: Claude Opus 4.8 (batch) vs OpenAI: GPT-5.6 Luna (batch): which should you use?
Choose Anthropic: Claude Opus 4.8 (batch) if…
On every published figure — price, context, benchmarks — it does not come out ahead of OpenAI: GPT-5.6 Luna (batch).
Choose OpenAI: GPT-5.6 Luna (batch) if…
- It sees more real traffic — #3 overall on OpenRouter's weekly ranking, against #21 for Anthropic: Claude Opus 4.8 (batch).
- Cheaper to read — $0.10 vs $2.50 per 1M input tokens, which is what dominates long-prompt and RAG workloads.
- Cheaper to write — $0.60 vs $12.50 per 1M output tokens, the line item that decides generation-heavy costs.
- Bigger context window — 1.1M vs 1M tokens.
- It is the newer model — released Jul 2026 against May 2026.
Spec Comparison
| Spec | Anthropic: Claude Opus 4.8 (batch) | OpenAI: GPT-5.6 Luna (batch) |
|---|---|---|
| Author | anthropic | openai |
| Input price (per 1M tokens) | $2.50 | $0.10 |
| Output price (per 1M tokens) | $12.50 | $0.60 |
| Context window | 1M | 1.1M |
| Input modalities | text, image, file | file, image, text |
| Output modalities | text | text |
| AA Intelligence | — | — |
| AA Coding | — | — |
| AA Agentic | — | — |
| Released | May 2026 | Jul 2026 |
What Anthropic: Claude Opus 4.8 (batch) and OpenAI: GPT-5.6 Luna (batch) actually cost to run
On a read-heavy job — 1M tokens in, 100K out — Anthropic: Claude Opus 4.8 (batch) costs $3.75 and OpenAI: GPT-5.6 Luna (batch) costs $0.16.
Flip the shape — 100K in, 1M out — and it becomes $13 for Anthropic: Claude Opus 4.8 (batch) versus $0.61 for OpenAI: GPT-5.6 Luna (batch).
Both figures are the published per-token rates multiplied out; caching and batch discounts are not included.
Usage Rank by Task
| Task | Anthropic: Claude Opus 4.8 (batch) | OpenAI: GPT-5.6 Luna (batch) |
|---|---|---|
| Overall | #21 | #3 |
| Multi-step Planning | — | #6 |
| Tool Dispatch | — | #4 |
| Web Search | — | #9 |
| Agent Workflows | — | #7 |
| Classification & Tagging | — | #3 |
| Debugging | — | #7 |
| DevOps Config | — | #6 |
| File Read/Write | — | #6 |
| Frontend UI | — | #5 |
| Code Implementation | — | #5 |
| Repo Analysis | — | #5 |
| Code Review & Security | — | #5 |
| SQL & Database | — | #5 |
| Content Writing | #7 | #8 |
About Anthropic: Claude Opus 4.8 (batch) and OpenAI: GPT-5.6 Luna (batch)
Anthropic: Claude Opus 4.8 (batch)
Built by anthropic · released May 2026 · 1M-token context
Claude Opus 4.8 is Anthropic's most capable generally available model in the Opus family. It supports text, image, and file inputs with text output, with reasoning support and a 1M-token...
OpenAI: GPT-5.6 Luna (batch)
Built by openai · released Jul 2026 · 1.1M-token context
GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...
Related comparisons
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- Anthropic: Claude Opus 4.8 (batch) vs Tencent: Hy3
- Anthropic: Claude Opus 4.8 (batch) vs DeepSeek: DeepSeek V4 Flash 0423
- OpenAI: GPT-5.6 Luna (batch) vs DeepSeek: DeepSeek V4 Flash 0731
- OpenAI: GPT-5.6 Luna (batch) vs Tencent: Hy3
- OpenAI: GPT-5.6 Luna (batch) vs DeepSeek: DeepSeek V4 Flash 0423
Get notified when Anthropic: Claude Opus 4.8 (batch) or OpenAI: GPT-5.6 Luna (batch) moves
Usage ranks and prices refresh weekly. We email you when they move — once a week, no spam.
FAQ
Which is better, Anthropic: Claude Opus 4.8 (batch) or OpenAI: GPT-5.6 Luna (batch)?
Based on weekly OpenRouter usage tracked by AI Tier List, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall — ahead of Anthropic: Claude Opus 4.8 (batch) at #21. OpenAI: GPT-5.6 Luna (batch) is cheaper on input tokens at $0.10/1M vs $2.50/1M for Anthropic: Claude Opus 4.8 (batch). OpenAI: GPT-5.6 Luna (batch) offers the larger context window at 1.1M tokens.
Which is cheaper, Anthropic: Claude Opus 4.8 (batch) or OpenAI: GPT-5.6 Luna (batch)?
OpenAI: GPT-5.6 Luna (batch) is cheaper at $0.10 per 1M input tokens. Output pricing: Anthropic: Claude Opus 4.8 (batch) $12.50, OpenAI: GPT-5.6 Luna (batch) $0.60.
Is OpenAI: GPT-5.6 Luna (batch) still ahead of Anthropic: Claude Opus 4.8 (batch) right now?
Yes. For the week of 2026-08-10, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall on OpenRouter usage against #21 for Anthropic: Claude Opus 4.8 (batch). Ranks refresh weekly, and the verdict on this page flips if they cross.
Usage ranks are weekly data aggregated by OpenRouter. Prices are USD per 1M tokens.