Model Comparison

Claude Haiku 4.5 vs Claude Opus 5Which is better in 2026?

Claude Opus 5 significantly outperforms across most benchmarks. Claude Haiku 4.5 is 5.0x cheaper per token.

Verdict: Claude Haiku 4.5 vs Claude Opus 5 — which is better?

Claude Haiku 4.5 (by Anthropic) and Claude Opus 5 (by Anthropic) 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 Haiku 4.5 outperforms in 0 benchmarks, while Claude Opus 5 is better at 1 benchmark (GDPval-AA). Claude Opus 5 significantly outperforms across most benchmarks.

On price, Claude Haiku 4.5 is roughly 5.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Opus 5 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Claude Haiku 4.5 if…

  • cost matters — it's about 5.0x cheaper per token

Choose Claude Opus 5 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Jul 2026

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Claude Haiku 4.5 outperforms in 0 benchmarks, while Claude Opus 5 is better at 1 benchmark (GDPval-AA).

Claude Opus 5 significantly outperforms across most benchmarks.

Sun Jul 26 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Claude Haiku 4.5 costs less

For input processing, Claude Haiku 4.5 ($1.00/1M tokens) is 5.0x cheaper than Claude Opus 5 ($5.00/1M tokens).

For output processing, Claude Haiku 4.5 ($5.00/1M tokens) is 5.0x cheaper than Claude Opus 5 ($25.00/1M tokens).

In conclusion, Claude Opus 5 is more expensive than Claude Haiku 4.5.*

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

Lowest available price from all providers
Sun Jul 26 2026 • llm-stats.com
Anthropic
Claude Haiku 4.5
Input tokens$1.00
Output tokens$5.00
Best providerAnthropic
Anthropic
Claude Opus 5
Input tokens$5.00
Output tokens$25.00
Best providerAnthropic
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 5 accepts 1,000,000 input tokens compared to Claude Haiku 4.5's 200,000 tokens. Claude Opus 5 can generate longer responses up to 128,000 tokens, while Claude Haiku 4.5 is limited to 64,000 tokens.

Anthropic
Claude Haiku 4.5
Input200,000 tokens
Output64,000 tokens
Anthropic
Claude Opus 5
Input1,000,000 tokens
Output128,000 tokens
Sun Jul 26 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Claude Haiku 4.5 and Claude Opus 5 support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Haiku 4.5

Text
Images
Audio
Video

Claude Opus 5

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Claude Haiku 4.5

Proprietary

Closed source

Claude Opus 5

Proprietary

Closed source

Release Timeline

When each model was launched

Claude Haiku 4.5 was released on 2025-10-15, while Claude Opus 5 was released on 2026-07-24.

Claude Opus 5 is 9 months newer than Claude Haiku 4.5.

Claude Haiku 4.5

Oct 15, 2025

9 months ago

Claude Opus 5

Jul 24, 2026

1 days ago

9mo newer

Knowledge Cutoff

When training data ends

Claude Haiku 4.5 has a documented knowledge cutoff of 2025-02-01, while Claude Opus 5's cutoff date is not specified.

We can confirm Claude Haiku 4.5's training data extends to 2025-02-01, but cannot make a direct comparison without Claude Opus 5's cutoff date.

Claude Haiku 4.5

Feb 2025

Claude Opus 5

—

Provider Availability

Claude Haiku 4.5 is available from Anthropic, Vertex AI. Claude Opus 5 is available from Anthropic.

Claude Haiku 4.5

anthropic logo
Anthropic
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M
vertex logo
Unknown Organization
Input Price:Input: $1.00/1MOutput Price:Output: $5.00/1M

Claude Opus 5

anthropic logo
Anthropic
Input Price:Input: $5.00/1MOutput Price:Output: $25.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Anthropic
Less expensive input tokens
Less expensive output tokens
Anthropic
Larger context window (1,000,000 tokens)
Higher GDPval-AA score (62.0% vs 30.1%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Claude Haiku 4.5 and Claude Opus 5 side-by-side, then vote on the output you prefer.

Claude Haiku 4.5
✓ Preferred
Claude Opus 5
Open in Playground
AI Model Comparison Table
Feature
Anthropic
Claude Haiku 4.5
Anthropic
Claude Opus 5

FAQ

Common questions about Claude Haiku 4.5 vs Claude Opus 5.

Which is better, Claude Haiku 4.5 or Claude Opus 5?

Claude Opus 5 significantly outperforms across most benchmarks. Claude Haiku 4.5 is made by Anthropic and Claude Opus 5 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Claude Haiku 4.5 compare to Claude Opus 5 in benchmarks?

Claude Haiku 4.5 scores Tau2 Retail: 83.2%, MMMLU: 83.0%, Tau2 Telecom: 83.0%, AIME 2025: 80.7%, SWE-Bench Verified: 73.3%. Claude Opus 5 scores BrowseComp: 90.8%, BioMysteryBench: 90.1%, OSWorld 2.0: 70.6%, DeepSWE 1.1: 68.8%, Humanity's Last Exam: 64.7%.

Is Claude Haiku 4.5 cheaper than Claude Opus 5?

Claude Haiku 4.5 is 5.0x cheaper for input tokens. Claude Haiku 4.5 costs $1.00/M input and $5.00/M output via anthropic. Claude Opus 5 costs $5.00/M input and $25.00/M output via anthropic.

What are the context window sizes for Claude Haiku 4.5 and Claude Opus 5?

Claude Haiku 4.5 supports 200K tokens and Claude Opus 5 supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Haiku 4.5 and Claude Opus 5?

Key differences include context window (200K vs 1.0M), input pricing ($1.00 vs $5.00/M). See the full comparison above for benchmark-by-benchmark results.

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