Model Comparison

Claude 3.5 Haiku vs o1-previewWhich is better in 2026?

o1-preview significantly outperforms across most benchmarks. Claude 3.5 Haiku is 16.4x cheaper per token.

Verdict: Claude 3.5 Haiku vs o1-preview — which is better?

Claude 3.5 Haiku (by Anthropic) and o1-preview (by OpenAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Claude 3.5 Haiku outperforms in 0 benchmarks, while o1-preview is better at 4 benchmarks (GPQA, MATH, MGSM, SWE-Bench Verified). o1-preview significantly outperforms across most benchmarks.

On price, Claude 3.5 Haiku is roughly 16.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude 3.5 Haiku also accepts a larger context window (200,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude 3.5 Haiku if…

  • cost matters — it's about 16.4x cheaper per token
  • you process long inputs — it offers a 200,000 token context window
  • you want the most recent training data — it shipped Oct 2024

Choose o1-preview if…

  • you want the strongest raw capability — it leads on 4 of 4 shared benchmarks
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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

Claude 3.5 Haiku outperforms in 0 benchmarks, while o1-preview is better at 4 benchmarks (GPQA, MATH, MGSM, SWE-Bench Verified).

o1-preview significantly outperforms across most benchmarks.

Wed Jun 10 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Claude 3.5 Haiku costs less

For input processing, Claude 3.5 Haiku ($0.80/1M tokens) is 18.8x cheaper than o1-preview ($15.00/1M tokens).

For output processing, Claude 3.5 Haiku ($4.00/1M tokens) is 15.0x cheaper than o1-preview ($60.00/1M tokens).

In conclusion, o1-preview is more expensive than Claude 3.5 Haiku.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Wed Jun 10 2026 • llm-stats.com
Anthropic
Claude 3.5 Haiku
Input tokens$0.80
Output tokens$4.00
Best providerAWS Bedrock
OpenAI
o1-preview
Input tokens$15.00
Output tokens$60.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude 3.5 Haiku accepts 200,000 input tokens compared to o1-preview's 128,000 tokens. Claude 3.5 Haiku can generate longer responses up to 200,000 tokens, while o1-preview is limited to 32,768 tokens.

Anthropic
Claude 3.5 Haiku
Input200,000 tokens
Output200,000 tokens
OpenAI
o1-preview
Input128,000 tokens
Output32,768 tokens
Wed Jun 10 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude 3.5 Haiku

Proprietary

Closed source

o1-preview

Proprietary

Closed source

Release Timeline

When each model was launched

Claude 3.5 Haiku was released on 2024-10-22, while o1-preview was released on 2024-09-12.

Claude 3.5 Haiku is 1 month newer than o1-preview.

Claude 3.5 Haiku

Oct 22, 2024

1.6 years ago

1mo newer
o1-preview

Sep 12, 2024

1.7 years ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Claude 3.5 Haiku is available from Bedrock, Google, Anthropic. o1-preview is available from OpenAI, Azure.

Claude 3.5 Haiku

bedrock logo
AWS Bedrock
Input Price:Input: $0.80/1MOutput Price:Output: $4.00/1M
google logo
Google
Input Price:Input: $0.80/1MOutput Price:Output: $4.00/1M
anthropic logo
Anthropic
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M

o1-preview

openai logo
OpenAI
Input Price:Input: $15.00/1MOutput Price:Output: $60.00/1M
azure logo
Azure
Input Price:Input: $16.50/1MOutput Price:Output: $66.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Larger context window (200,000 tokens)
Less expensive input tokens
Less expensive output tokens
OpenAI
Higher GPQA score (73.3% vs 41.6%)
Higher MATH score (85.5% vs 69.4%)
Higher MGSM score (90.8% vs 85.6%)
Higher SWE-Bench Verified score (41.3% vs 40.6%)

Detailed Comparison

AI Model Comparison Table
Feature
Anthropic
Claude 3.5 Haiku
OpenAI
o1-preview

FAQ

Common questions about Claude 3.5 Haiku vs o1-preview.

Which is better, Claude 3.5 Haiku or o1-preview?

o1-preview significantly outperforms across most benchmarks. Claude 3.5 Haiku is made by Anthropic and o1-preview is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude 3.5 Haiku compare to o1-preview in benchmarks?

Claude 3.5 Haiku scores HumanEval: 88.1%, MGSM: 85.6%, DROP: 83.1%, MATH: 69.4%, MMLU-Pro: 65.0%. o1-preview scores MGSM: 90.8%, MMLU: 90.8%, MATH: 85.5%, GPQA: 73.3%, LiveBench: 52.3%.

Is Claude 3.5 Haiku cheaper than o1-preview?

Claude 3.5 Haiku is 18.8x cheaper for input tokens. Claude 3.5 Haiku costs $0.80/M input and $4.00/M output via bedrock. o1-preview costs $15.00/M input and $60.00/M output via openai.

What are the context window sizes for Claude 3.5 Haiku and o1-preview?

Claude 3.5 Haiku supports 200K tokens and o1-preview supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude 3.5 Haiku and o1-preview?

Key differences include context window (200K vs 128K), input pricing ($0.80 vs $15.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude 3.5 Haiku and o1-preview?

Claude 3.5 Haiku is developed by Anthropic and o1-preview is developed by OpenAI.

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