Claude 3 Opus vs GPT-5.5 Pro
Claude 3 Opus vs GPT-5.5 Pro: Claude 3 Opus is cheaper for input-heavy usage ($15.00/M vs $30.00/M input tokens), while GPT-5.5 Pro is better for long-context tasks (1,050,000 tokens).
Direct answer: choose Claude 3 Opus for lower token spend and choose GPT-5.5 Pro when your workload needs longer context.
Common pricing searches covered on this page: Claude 3 Opus vs GPT-5.5 Pro • Claude 3 Opus vs GPT-5.5 Pro pricing • Claude 3 Opus vs GPT-5.5 Pro API pricing and 3 opus vs 5 5 pro pricing.
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Claude 3 Opus
GPT-5.5 Pro
Cost Differences
GPT-5.5 Pro costs more than Claude 3 Opus
Quick Recommendation
Winner for direct API pricing: Claude 3 Opus. At the default workload, Claude 3 Opus saves about $202.50/month ($2,463.75/year) versus GPT-5.5 Pro.
Feature Comparison
| Feature | Claude 3 Opus | GPT-5.5 Pro |
|---|---|---|
| Provider | Anthropic | OpenAI |
| Input Price | $15.00/1M tokens | $30.00/1M tokens |
| Output Price | $75.00/1M tokens | $180.00/1M tokens |
| Context Window | 200,000 tokens | 1,050,000 tokens |
| Max Output | 4,096 tokens | 128,000 tokens |
| Category | flagship | reasoning |
| Capabilities | textvisionreasoning | textvisioncodereasoning |
| Release Date | 3/4/2024 | 4/24/2026 |
Claude 3 Opus vs GPT-5.5 Pro: Which Should You Choose?
Choosing between Claude 3 Opus and GPT-5.5 Pro depends on your priorities: cost efficiency, context length, or raw capability. Claude 3 Opus is the more affordable option at $15.00/1M input tokens — 50% cheaper than GPT-5.5 Pro. Meanwhile, GPT-5.5 Pro offers a significantly larger context window at 1,050,000 tokens vs 200,000 for Claude 3 Opus.
These models come from different providers — Anthropic and OpenAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Anthropic, switching to OpenAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: Claude 3 Opus is a flagship model while GPT-5.5 Pro is reasoning. This means they're optimized for different workloads. Claude 3 Opus is built for complex tasks that require deeper reasoning, while GPT-5.5 Pro offers better value for routine operations.
Output costs matter too. Claude 3 Opus charges $75.00/1M output tokens vs $180.00 for GPT-5.5 Pro. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Claude 3 Opus has the edge here at $75.00/1M output tokens.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Claude 3 Opus when:
- • Budget is a primary concern
- • You're already using Anthropic's API ecosystem
Choose GPT-5.5 Pro when:
- • You need a larger context window (1,050,000 tokens)
- • You need more capabilities (code)
- • You need longer outputs (up to 128,000 tokens)
- • You're already using OpenAI's API ecosystem
Pros and Caveats at a Glance
Claude 3 Opus
- • Input pricing: $15.00/M tokens
- • Output pricing: $75.00/M tokens
- • Context window: 200,000 tokens
- • Max output: 4,096 tokens
Watch out for
- • Smaller context window than GPT-5.5 Pro
GPT-5.5 Pro
- • Input pricing: $30.00/M tokens
- • Output pricing: $180.00/M tokens
- • Context window: 1,050,000 tokens
- • Max output: 128,000 tokens
Watch out for
- • Higher input cost than Claude 3 Opus
- • Higher output cost than Claude 3 Opus
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Claude 3 Opus (Anthropic)
GPT-5.5 Pro (OpenAI)
Start using Claude 3 Opus today
Sign Up for Anthropic →Start using GPT-5.5 Pro today
Sign Up for OpenAI →Frequently Asked Questions
Which is cheaper, Claude 3 Opus or GPT-5.5 Pro?▼
What is the context window difference between Claude 3 Opus and GPT-5.5 Pro?▼
Which model is better for AI Chatbot?▼
Which model has better overall pricing for heavy usage?▼
Where can I compare Anthropic and OpenAI API pricing beyond this model matchup?▼
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