API cost decision in 10 seconds

GPT-5.5 Pro vs 🔥Claude Opus 4.7

Pick Claude Opus 4.7 for lower cost; pick GPT-5.5 Pro only if the larger context window matters more.

Pricing data updated:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Claude Opus 4.7 for lower cost; pick GPT-5.5 Pro only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Claude Opus 4.7 is estimated at $17.5 vs $120 for GPT-5.5 Pro, saving $102.5 (85.4% lower).

Cost-first pickClaude Opus 4.7
Context-first pickGPT-5.5 Pro
Sample savings$102.585.4%
10x traffic gap$1025

GPT-5.5 Pro has more context, but Claude Opus 4.7 saves $102.5 on the standard workload. At 10x that traffic, the same price gap is about $1025. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Claude Opus 4.7 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickGPT-5.5 ProClaude Opus 4.7
Input-heavy / RAG 5M input + 500K output Claude Opus 4.7 $240 $37.5
Balanced workload 1M input + 1M output Claude Opus 4.7 $210 $30
Output-heavy chatbot 1M input + 5M output Claude Opus 4.7 $930 $130
Cheaper inputClaude Opus 4.7$30 vs $5 / 1M
Cheaper outputClaude Opus 4.7$180 vs $25 / 1M
Larger contextGPT-5.5 Pro1.05M vs 1M
Sample workloadClaude Opus 4.7$120 vs $17.5

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
GPT-5.5 ProCalculating…Estimated API cost
Claude Opus 4.7Calculating…Estimated API cost
Cheaper for this workloadCalculating…Difference: calculating…

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Quick Decision

Verdict

Claude Opus 4.7 has the lower input price, Claude Opus 4.7 has the lower output price, and GPT-5.5 Pro offers the larger context window.

For a 1M input token plus 500K output token workload, the estimated API cost is $120 for GPT-5.5 Pro and $17.5 for Claude Opus 4.7.

Best Fit

Choose GPT-5.5 Pro when you care most about larger context window.

Choose Claude Opus 4.7 when you care most about lower input-token price, and lower output-token price.

Head-to-Head Specs
FeatureGPT-5.5 Pro
(OpenAI)		🔥Claude Opus 4.7
(Anthropic)
Input Price
prompt tokens per 1M		$30$5
Completion Price
per 1M tokens		$180$25
Sample Workload Cost
1M input + 500K output		$120$17.5
Context Window1.05M1M
Release Date2026-04-242026-04-16
Popularity#3
GPT-5.5 Pro

GPT-5.5 Pro is OpenAI’s high-capability model optimized for deep reasoning and accuracy on complex, high-stakes workloads. It features a 1M+ token context window (922K input, 128K output) with support for...

Claude Opus 4.7

Opus 4.7 is the next generation of Anthropic's Opus family, built for long-running, asynchronous agents. Building on the coding and agentic strengths of Opus 4.6, it delivers stronger performance on...

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionClaude Opus 4.7On the standard 1M input plus 500K output workload, Claude Opus 4.7 is estimated at $17.5 vs $120 for GPT-5.5 Pro, saving $102.5 (85.4% lower).
High-volume input processingClaude Opus 4.7Lower prompt-token price matters most when prompts or retrieved passages dominate the bill.
Long responses and chatbotsClaude Opus 4.7Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workGPT-5.5 ProA larger context window leaves more room for retrieved passages and source files.