High-volume, cost-sensitive work
Either one
Both cost $0.20 per million tokens on a typical mix of three input tokens for every output token.
Claude Haiku 5.5 vs GPT-6 Luna Pro: price, context and capabilities
Choose Claude Haiku 5.5 for the latest release; on the other points the two are level or the data is missing.
In short
- Both cost the same at the headline price ($0.20 / 1M tokens).
- GPT-6 Luna Pro reads more per request: 1.05M tokens against 1M.
- Claude Haiku 5.5 is the newer model (October 2026, against Sep 22, 2026).
- Only Claude Haiku 5.5 offers batch api.
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Latest release
Choose Claude Haiku 5.5
Claude Haiku 5.5 is the newer release (October 2026, against Sep 22, 2026 for GPT-6 Luna Pro).
Monthly cost at three volumes
| Volume | Claude Haiku 5.5 | GPT-6 Luna Pro | Difference |
|---|---|---|---|
| Prototype: 1M input, 250K output tokens | $0.23 | $0.23 | = |
| Production: 20M input, 5M output tokens | $4.50 | $4.50 | = |
| Scale: 500M input, 100M output tokens | $100.00 | $100.00 | = |
Standard rates, without caching or batch discounts. Volumes are per month.
Specifications side by side
| Claude Haiku 5.5 | GPT-6 Luna Pro | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Category | Language models | Language models |
| Status | Generally available | Generally available |
| Headline price | $0.20 / 1M tokens | $0.20 / 1M tokens |
| Input | $0.10 / 1M tokens | $0.10 / 1M tokens |
| Output | $0.50 / 1M tokens | $0.50 / 1M tokens |
| Cached input | $0.01 / 1M tokens | $0.01 / 1M tokens |
| Context window | 1M | 1.05M |
| Max output | 128k | 128k |
| Released | October 2026 | Sep 22, 2026 |
| Knowledge cutoff | June 2026 | No data |
| Licence | Proprietary | Proprietary |
| Capabilities | Vision, Reasoning, Tool calling, Structured output, Prompt caching, Batch API | Vision, Reasoning, Tool calling, Structured output, Prompt caching |
| API model id | claude-haiku-5-5 | gpt-6-luna-pro |
Benchmarks side by side
Leader in bold.
| Benchmark | Claude Haiku 5.5 | GPT-6 Luna Pro |
|---|---|---|
| Intelligence Index | 43.4 | No data |
| SciCode | 55% | No data |
| Humanity's Last Exam | 44.4% | No data |
| Long-context reasoning (AA-LCR) | 82.7% | No data |
Independent evaluations by Artificial Analysis, run the same way for every model, at the reasoning setting shown. Percentages unless marked as an index.
Frequently asked questions
Should I choose Claude Haiku 5.5 or GPT-6 Luna Pro?
Choose Claude Haiku 5.5 for the latest release; on the other points the two are level or the data is missing.
Which is cheaper, Claude Haiku 5.5 or GPT-6 Luna Pro?
Both cost the same at the headline price ($0.20 / 1M tokens).
Which has the larger context window, Claude Haiku 5.5 or GPT-6 Luna Pro?
GPT-6 Luna Pro reads more per request: 1.05M tokens against 1M.
What is the difference between Claude Haiku 5.5 and GPT-6 Luna Pro?
Claude Haiku 5.5 is made by Anthropic and GPT-6 Luna Pro by OpenAI. Both cost the same at the headline price ($0.20 / 1M tokens). GPT-6 Luna Pro reads more per request: 1.05M tokens against 1M. Claude Haiku 5.5 is the newer model (October 2026, against Sep 22, 2026). Only Claude Haiku 5.5 offers batch api.
How much do Claude Haiku 5.5 and GPT-6 Luna Pro cost per month?
At 20 million input and 5 million output tokens a month, Claude Haiku 5.5 costs $4.50 and GPT-6 Luna Pro costs $4.50, at standard rates.
Which is newer, Claude Haiku 5.5 or GPT-6 Luna Pro?
Claude Haiku 5.5 was released on October 2026 and GPT-6 Luna Pro on Sep 22, 2026.