API cost decision in 10 seconds

🔥Claude Opus 4.7 vs GPT-5.3 Chat

Pick GPT-5.3 Chat for lower cost; pick Claude Opus 4.7 only if the larger context window matters more.

Page updated:  Data confirmed:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick GPT-5.3 Chat for lower cost; pick Claude Opus 4.7 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, GPT-5.3 Chat is estimated at $8.75 vs $17.5 for Claude Opus 4.7, saving $8.75 (50% lower).

Cost-first pickGPT-5.3 Chat
Context-first pickClaude Opus 4.7
Sample savings$8.7550%
10x traffic gap$87.5

Claude Opus 4.7 has more context, but GPT-5.3 Chat saves $8.75 on the standard workload. At 10x that traffic, the same price gap is about $87.5. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

GPT-5.3 Chat stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickClaude Opus 4.7GPT-5.3 Chat
Input-heavy / RAG5M input + 500K outputGPT-5.3 Chat$37.5$15.75
Balanced workload1M input + 1M outputGPT-5.3 Chat$30$15.75
Output-heavy chatbot1M input + 5M outputGPT-5.3 Chat$130$71.75
Cheaper input GPT-5.3 Chat $5 vs $1.75 / 1M

GPT-5.3 Chat is $3.25 cheaper per 1M input tokens (65% lower; 2.86x difference).

Cheaper output GPT-5.3 Chat $25 vs $14 / 1M

GPT-5.3 Chat is $11 cheaper per 1M output tokens (44% lower; 1.79x difference).

Larger context Claude Opus 4.7 1M vs 128K

Claude Opus 4.7 has 872K more context (7.81x larger).

Sample workload GPT-5.3 Chat $17.5 vs $8.75

GPT-5.3 Chat is $8.75 cheaper on the standard workload (50% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Claude Opus 4.7 Calculating… Estimated API cost
GPT-5.3 Chat Calculating… Estimated API cost
Cheaper for this workload Calculating… 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

GPT-5.3 Chat has the lower input price; GPT-5.3 Chat has the lower output price; Claude Opus 4.7 offers the larger context window. For the 1M input plus 500K output sample, GPT-5.3 Chat is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $17.5 for Claude Opus 4.7 and $8.75 for GPT-5.3 Chat.

Best Fit

Choose Claude Opus 4.7 when you care most about larger context window.

Choose GPT-5.3 Chat when you care most about lower input-token price, and lower output-token price.

Decision Notes
  • On the standard 1M input plus 500K output workload, GPT-5.3 Chat is estimated at $8.75 vs $17.5 for Claude Opus 4.7, saving $8.75 (50% lower).
  • GPT-5.3 Chat is $8.75 cheaper on the standard workload (50% lower).
  • GPT-5.3 Chat is $3.25 cheaper per 1M input tokens (65% lower; 2.86x difference).
  • GPT-5.3 Chat is $11 cheaper per 1M output tokens (44% lower; 1.79x difference).
  • Claude Opus 4.7 has 872K more context (7.81x larger).
Head-to-Head Specs
Feature🔥Claude Opus 4.7
(Anthropic)		GPT-5.3 Chat
(OpenAI)
Input Price
prompt tokens per 1M		$5$1.75
Completion Price
per 1M tokens		$25$14
Sample Workload Cost
1M input + 500K output		$17.5$8.75
Context Window1M128K
Release Date
Popularity#3

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionGPT-5.3 ChatOn the standard 1M input plus 500K output workload, GPT-5.3 Chat is estimated at $8.75 vs $17.5 for Claude Opus 4.7, saving $8.75 (50% lower).
High-volume input processingGPT-5.3 ChatLower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsGPT-5.3 ChatLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workClaude Opus 4.7A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps
  • Claude 3 Haiku can replace Claude Opus 4.7 when lower sample workload cost matters most: $0.88.
  • Claude 3.5 Haiku can replace Claude Opus 4.7 when lower sample workload cost matters most: $2.8.
  • Anthropic Claude Haiku Latest can replace Claude Opus 4.7 when lower sample workload cost matters most: $3.5.
  • Claude Haiku 4.5 can replace Claude Opus 4.7 when lower sample workload cost matters most: $3.5.
Larger context near this budget
  • Llama 4 Scout offers 10M context with $0.23 sample workload cost.
  • Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
  • Grok 4.20 offers 2M context with $2.5 sample workload cost.
  • GPT-5.5 offers 1.05M context with $20 sample workload cost.

Cheaper alternatives

Review low-cost models sorted by a standard 1M input plus 500K output workload.

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Larger context alternatives

Find models with larger context windows for RAG, long documents, and codebase review.

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Provider catalogs

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Anthropic catalog

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OpenAI catalog

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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...

GPT-5.3 Chat

GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more directly helpful. It delivers more accurate answers with better contextualization and significantly...