Make AI phone calls with one API call

Start for free

Model Comparison

GPT-4o vs Claude Opus 4

Claude Opus 4 significantly outperforms across most benchmarks. GPT-4o is 6.9x cheaper per token.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

GPT-4o outperforms in 0 benchmarks, while Claude Opus 4 is better at 5 benchmarks (GPQA, MMMLU, SWE-Bench Verified, TAU-bench Airline, TAU-bench Retail).

Claude Opus 4 significantly outperforms across most benchmarks.

Fri Apr 24 2026 • llm-stats.com

Arena Performance

Human preference votes

CallingBox

Done comparing? Ship the phone agent.

One API for outbound and inbound calls.

Start for freeRead the docs
$0.05 /min all-in7 lines of code

Pricing Analysis

Price comparison per million tokens

GPT-4o costs less

For input processing, GPT-4o ($2.50/1M tokens) is 6.0x cheaper than Claude Opus 4 ($15.00/1M tokens).

For output processing, GPT-4o ($10.00/1M tokens) is 7.5x cheaper than Claude Opus 4 ($75.00/1M tokens).

In conclusion, Claude Opus 4 is more expensive than GPT-4o.*

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

Lowest available price from all providers
Fri Apr 24 2026 • llm-stats.com
OpenAI
GPT-4o
Input tokens$2.50
Output tokens$10.00
Best providerAzure
Anthropic
Claude Opus 4
Input tokens$15.00
Output tokens$75.00
Best providerAnthropic
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Claude Opus 4 accepts 200,000 input tokens compared to GPT-4o's 128,000 tokens. Claude Opus 4 can generate longer responses up to 32,000 tokens, while GPT-4o is limited to 16,384 tokens.

OpenAI
GPT-4o
Input128,000 tokens
Output16,384 tokens
Anthropic
Claude Opus 4
Input200,000 tokens
Output32,000 tokens
Fri Apr 24 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-4o and Claude Opus 4 support multimodal inputs.

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

GPT-4o

Text
Images
Audio
Video

Claude Opus 4

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.

GPT-4o

Proprietary

Closed source

Claude Opus 4

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-4o was released on 2024-08-06, while Claude Opus 4 was released on 2025-05-22.

Claude Opus 4 is 10 months newer than GPT-4o.

GPT-4o

Aug 6, 2024

1.7 years ago

Claude Opus 4

May 22, 2025

11 months ago

9mo newer

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

GPT-4o is available from Azure, OpenAI. Claude Opus 4 is available from Anthropic, Bedrock, Google.

GPT-4o

azure logo
Azure
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M
openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M

Claude Opus 4

anthropic logo
Anthropic
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
bedrock logo
AWS Bedrock
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
google logo
Google
Input Price:Input: $15.00/1MOutput Price:Output: $75.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Less expensive input tokens
Less expensive output tokens
Anthropic
Larger context window (200,000 tokens)
Higher GPQA score (79.6% vs 70.1%)
Higher MMMLU score (88.8% vs 81.4%)
Higher SWE-Bench Verified score (72.5% vs 33.2%)
Higher TAU-bench Airline score (59.6% vs 42.8%)
Higher TAU-bench Retail score (81.4% vs 60.3%)
OpenAIGPT-4o
AnthropicClaude Opus 4
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-4o
Anthropic
Claude Opus 4

FAQ

Common questions about GPT-4o vs Claude Opus 4

Claude Opus 4 significantly outperforms across most benchmarks. GPT-4o is made by OpenAI and Claude Opus 4 is made by Anthropic. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
GPT-4o scores AI2D: 94.2%, DocVQA: 92.8%, ChartQA: 85.7%, MMLU: 85.7%, CharXiv-D: 85.3%. Claude Opus 4 scores MMMLU: 88.8%, TAU-bench Retail: 81.4%, GPQA: 79.6%, MMMU (validation): 76.5%, AIME 2025: 75.5%.
GPT-4o is 6.0x cheaper for input tokens. GPT-4o costs $2.50/M input and $10.00/M output via azure. Claude Opus 4 costs $15.00/M input and $75.00/M output via anthropic.
GPT-4o supports 128K tokens and Claude Opus 4 supports 200K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (128K vs 200K), input pricing ($2.50 vs $15.00/M). See the full comparison above for benchmark-by-benchmark results.
GPT-4o is developed by OpenAI and Claude Opus 4 is developed by Anthropic.