Anthropic: Claude 3.5 Sonnet vs OpenAI: GPT-5.3 Chat
Side-by-side comparison of Anthropic: Claude 3.5 Sonnet and OpenAI: GPT-5.3 Chat. Compare pricing, context window, capabilities, and find out which is better for your workflow.
Verdict
strong confidenceOpenAI: GPT-5.3 Chat leads overall
OpenAI: GPT-5.3 Chat leads in price and max output, making it the stronger choice for most workflows. Anthropic: Claude 3.5 Sonnet remains competitive with advantages in context window.
Best for with Anthropic: Claude 3.5 Sonnet
Best for with OpenAI: GPT-5.3 Chat
Side-by-side
Technical specifications
| Anthropic: Claude 3.5 Sonnet | OpenAI: GPT-5.3 Chat | |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input price | $6/M | $2/M |
| Output price | $30/M | $14/M |
| Context window | 200K | 128K |
| Max output | 8K | 16K |
| Capabilities | Tool useVision | Tool useVision |
| Released | Oct 21, 2024 | Mar 3, 2026 |
Scoring breakdown
How each dimension compares
Price
OpenAI: GPT-5.3 Chat leadsAnthropic: Claude 3.5 Sonnet
$30/M tokens
OpenAI: GPT-5.3 Chat
$14/M tokens
Context Window
Anthropic: Claude 3.5 Sonnet leadsAnthropic: Claude 3.5 Sonnet
200K tokens
OpenAI: GPT-5.3 Chat
128K tokens
Capabilities
Anthropic: Claude 3.5 Sonnet
2/4
OpenAI: GPT-5.3 Chat
2/4
Max Output
OpenAI: GPT-5.3 Chat leadsAnthropic: Claude 3.5 Sonnet
8K tokens
OpenAI: GPT-5.3 Chat
16K tokens
Recency
Anthropic: Claude 3.5 Sonnet
Oct 2024
OpenAI: GPT-5.3 Chat
Mar 2026
Related comparisons
Anthropic: Claude 3.5 Sonnet vs Google: Gemini 2.5 Pro
flagship tier · Cross-provider
Anthropic: Claude 3.5 Sonnet vs Google: Gemini 2.5 Pro Preview 06-05
flagship tier · Cross-provider
Anthropic: Claude 3.5 Sonnet vs Google: Gemini 2.5 Pro Preview 05-06
flagship tier · Cross-provider
Anthropic: Claude 3.5 Sonnet vs Google: Gemini 3.1 Pro Preview
flagship tier · Cross-provider