API cost decision in 10 seconds

GPT-5 vs NewClaude Opus 4.7 (Fast)

Pick GPT-5 for lower cost; pick Claude Opus 4.7 (Fast) 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 for lower cost; pick Claude Opus 4.7 (Fast) only if the larger context window matters more.

On the standard 1M input plus 500K output workload, GPT-5 is estimated at $6.25 vs $105 for Claude Opus 4.7 (Fast), saving $98.75 (94% lower).

Cost-first pickGPT-5
Context-first pickClaude Opus 4.7 (Fast)
Sample savings$98.7594%
10x traffic gap$987.5

Claude Opus 4.7 (Fast) has more context, but GPT-5 saves $98.75 on the standard workload. At 10x that traffic, the same price gap is about $987.5. 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 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickGPT-5Claude Opus 4.7 (Fast)
Input-heavy / RAG5M input + 500K outputGPT-5$11.25$225
Balanced workload1M input + 1M outputGPT-5$11.25$180
Output-heavy chatbot1M input + 5M outputGPT-5$51.25$780
Cheaper input GPT-5 $1.25 vs $30 / 1M

GPT-5 is $28.75 cheaper per 1M input tokens (95.8% lower; 24x difference).

Cheaper output GPT-5 $10 vs $150 / 1M

GPT-5 is $140 cheaper per 1M output tokens (93.3% lower; 15x difference).

Larger context Claude Opus 4.7 (Fast) 400K vs 1M

Claude Opus 4.7 (Fast) has 600K more context (2.5x larger).

Sample workload GPT-5 $6.25 vs $105

GPT-5 is $98.75 cheaper on the standard workload (94% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
GPT-5 Calculating… Estimated API cost
Claude Opus 4.7 (Fast) 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 has the lower input price; GPT-5 has the lower output price; Claude Opus 4.7 (Fast) offers the larger context window. For the 1M input plus 500K output sample, GPT-5 is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $6.25 for GPT-5 and $105 for Claude Opus 4.7 (Fast).

Best Fit

Choose GPT-5 when you care most about lower input-token price, and lower output-token price.

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

Decision Notes
  • On the standard 1M input plus 500K output workload, GPT-5 is estimated at $6.25 vs $105 for Claude Opus 4.7 (Fast), saving $98.75 (94% lower).
  • GPT-5 is $98.75 cheaper on the standard workload (94% lower).
  • GPT-5 is $28.75 cheaper per 1M input tokens (95.8% lower; 24x difference).
  • GPT-5 is $140 cheaper per 1M output tokens (93.3% lower; 15x difference).
  • Claude Opus 4.7 (Fast) has 600K more context (2.5x larger).
Head-to-Head Specs
FeatureGPT-5
(OpenAI)		NewClaude Opus 4.7 (Fast)
(Anthropic)
Input Price
prompt tokens per 1M		$1.25$30
Completion Price
per 1M tokens		$10$150
Sample Workload Cost
1M input + 500K output		$6.25$105
Context Window400K1M
Release Date
Popularity#57#112

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionGPT-5On the standard 1M input plus 500K output workload, GPT-5 is estimated at $6.25 vs $105 for Claude Opus 4.7 (Fast), saving $98.75 (94% lower).
High-volume input processingGPT-5Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsGPT-5Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workClaude Opus 4.7 (Fast)A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps
  • gpt-oss-120b (free) can replace GPT-5 when lower sample workload cost matters most: $0.
  • gpt-oss-20b (free) can replace GPT-5 when lower sample workload cost matters most: $0.
  • gpt-oss-20b can replace GPT-5 when lower sample workload cost matters most: $0.1.
  • gpt-oss-120b can replace GPT-5 when lower sample workload cost matters most: $0.13.
Larger context near this budget
  • Llama 4 Scout offers 10M context with $0.23 sample workload cost.
  • Grok 4.20 offers 2M context with $2.5 sample workload cost.
  • Grok 4.20 Multi-Agent offers 2M context with $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.

Open largest context models

Provider catalogs

Compare models within provider hubs before choosing a final API vendor.

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OpenAI catalog

Review all tracked OpenAI models before deciding whether this matchup is the right shortlist.

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Anthropic catalog

Check other Anthropic models with comparable pricing, context, or release timing.

Open Anthropic models
GPT-5

GPT-5 is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience. It is optimized for complex tasks that require step-by-step reasoning, instruction following, and accuracy...

Claude Opus 4.7 (Fast)

Fast-mode variant of [Opus 4.7](/anthropic/claude-opus-4.7) - identical capabilities with higher output speed at premium 6x pricing. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode