High-volume, cost-sensitive work
Choose GPT-5 nano
GPT-5 nano costs 31% less on a typical mix of three input tokens for every output token ($0.14 against $0.20 per million tokens).
Claude Haiku 5.5 vs GPT-5 nano: price, context and capabilities
Choose Claude Haiku 5.5 for very long inputs, reasoning over long documents, the latest release and the most recent knowledge. Choose GPT-5 nano for high-volume, cost-sensitive work, writing and code generation and reused prompts and documents (RAG, agents).
In short
- GPT-5 nano is 31% cheaper than Claude Haiku 5.5 at the headline price ($0.1375 / 1M tokens vs $0.20 / 1M tokens).
- Claude Haiku 5.5 reads more per request: 1M tokens against 400k.
- Claude Haiku 5.5 is the newer model (October 2026, against Aug 7, 2025).
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Writing and code generation
Choose GPT-5 nano
GPT-5 nano charges $0.40 per million output tokens, against $0.50 for Claude Haiku 5.5. Output dominates the bill when answers are long.
Reused prompts and documents (RAG, agents)
Choose GPT-5 nano
GPT-5 nano charges <$0.01 per million cached input tokens, against $0.01 for Claude Haiku 5.5.
Very long inputs
Choose Claude Haiku 5.5
Claude Haiku 5.5 reads up to 1M tokens per request, against 400k for GPT-5 nano.
Reasoning over long documents
Choose Claude Haiku 5.5
Claude Haiku 5.5 scores 82.7% on Long-context reasoning (AA-LCR), against 45% for GPT-5 nano.
Latest release
Choose Claude Haiku 5.5
Claude Haiku 5.5 is the newer release (October 2026, against Aug 7, 2025 for GPT-5 nano).
Most recent knowledge
Choose Claude Haiku 5.5
Claude Haiku 5.5 was trained on data up to June 2026, against May 2024 for GPT-5 nano.
Monthly cost at three volumes
| Volume | Claude Haiku 5.5 | GPT-5 nano | Difference |
|---|---|---|---|
| Prototype: 1M input, 250K output tokens | $0.23 | $0.15 | GPT-5 nano, $0.08 less |
| Production: 20M input, 5M output tokens | $4.50 | $3.00 | GPT-5 nano, $1.50 less |
| Scale: 500M input, 100M output tokens | $100.00 | $65.00 | GPT-5 nano, $35.00 less |
Standard rates, without caching or batch discounts. Volumes are per month.
Specifications side by side
| Claude Haiku 5.5 | GPT-5 nano | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Category | Language models | Language models |
| Status | Generally available | Legacy |
| Headline price | $0.20 / 1M tokens | $0.1375 / 1M tokens |
| Input | $0.10 / 1M tokens | $0.05 / 1M tokens |
| Output | $0.50 / 1M tokens | $0.40 / 1M tokens |
| Cached input | $0.01 / 1M tokens | $0.005 / 1M tokens |
| Context window | 1M | 400k |
| Max output | 128k | 128k |
| Released | October 2026 | Aug 7, 2025 |
| Knowledge cutoff | June 2026 | May 2024 |
| Licence | Proprietary | Proprietary |
| Capabilities | Vision, Reasoning, Tool calling, Structured output, Prompt caching, Batch API | Vision, Reasoning, Tool calling, Structured output, Prompt caching, Batch API |
| API model id | claude-haiku-5-5 | gpt-5-nano |
Benchmarks side by side
Leader in bold.
| Benchmark | Claude Haiku 5.5 | GPT-5 nano |
|---|---|---|
| Humanity's Last Exam | 44.4% | 9.5% |
| Long-context reasoning (AA-LCR) | 82.7% | 45% |
| Intelligence Index | 43.4 | No data |
| SciCode | 55% | No data |
| Terminal-Bench Hard | No data | 12.1% |
| GPQA Diamond | No data | 67.6% |
| IFBench (instruction following) | No data | 67.6% |
| τ²-Bench (agentic tool use) | No data | 36.5% |
| MMMU-Pro (visual reasoning) | No data | 61% |
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-5 nano?
Choose Claude Haiku 5.5 for very long inputs, reasoning over long documents, the latest release and the most recent knowledge. Choose GPT-5 nano for high-volume, cost-sensitive work, writing and code generation and reused prompts and documents (RAG, agents).
Which is cheaper, Claude Haiku 5.5 or GPT-5 nano?
GPT-5 nano is 31% cheaper than Claude Haiku 5.5 at the headline price ($0.1375 / 1M tokens vs $0.20 / 1M tokens).
Which has the larger context window, Claude Haiku 5.5 or GPT-5 nano?
Claude Haiku 5.5 reads more per request: 1M tokens against 400k.
What is the difference between Claude Haiku 5.5 and GPT-5 nano?
Claude Haiku 5.5 is made by Anthropic and GPT-5 nano by OpenAI. GPT-5 nano is 31% cheaper than Claude Haiku 5.5 at the headline price ($0.1375 / 1M tokens vs $0.20 / 1M tokens). Claude Haiku 5.5 reads more per request: 1M tokens against 400k. Claude Haiku 5.5 is the newer model (October 2026, against Aug 7, 2025).
How much do Claude Haiku 5.5 and GPT-5 nano cost per month?
At 20 million input and 5 million output tokens a month, Claude Haiku 5.5 costs $4.50 and GPT-5 nano costs $3.00, at standard rates.
Which is newer, Claude Haiku 5.5 or GPT-5 nano?
Claude Haiku 5.5 was released on October 2026 and GPT-5 nano on Aug 7, 2025.