API cost decision in 10 seconds

Claude Sonnet 4 vs GPT-5.4 Image 2

Pick Claude Sonnet 4 when budget and context both matter.

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

Budget verdict

Pick Claude Sonnet 4 when budget and context both matter.

On the standard 1M input plus 500K output workload, Claude Sonnet 4 is estimated at $10.5 vs $15.5 for GPT-5.4 Image 2, saving $5 (32.3% lower).

Cost-first pickClaude Sonnet 4
Context-first pickClaude Sonnet 4
Sample savings$532.3%
10x traffic gap$50

Claude Sonnet 4 is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $50. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Claude Sonnet 4 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickClaude Sonnet 4GPT-5.4 Image 2
Input-heavy / RAG5M input + 500K outputClaude Sonnet 4$22.5$47.5
Balanced workload1M input + 1M outputClaude Sonnet 4$18$23
Output-heavy chatbot1M input + 5M outputClaude Sonnet 4$78$83
Cheaper input Claude Sonnet 4 $3 vs $8 / 1M

Claude Sonnet 4 is $5 cheaper per 1M input tokens (62.5% lower; 2.67x difference).

Cheaper output Tie $15 vs $15 / 1M

Both models report the same output price at $15 per 1M tokens.

Larger context Claude Sonnet 4 1M vs 272K

Claude Sonnet 4 has 728K more context (3.68x larger).

Sample workload Claude Sonnet 4 $10.5 vs $15.5

Claude Sonnet 4 is $5 cheaper on the standard workload (32.3% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Claude Sonnet 4 Calculating… Estimated API cost
GPT-5.4 Image 2 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

Claude Sonnet 4 has the lower input price; both models tie on output price; Claude Sonnet 4 offers the larger context window. For the 1M input plus 500K output sample, Claude Sonnet 4 is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $10.5 for Claude Sonnet 4 and $15.5 for GPT-5.4 Image 2.

Best Fit

Choose Claude Sonnet 4 when you care most about lower input-token price, and larger context window.

Choose GPT-5.4 Image 2 when its provider, model quality, latency, or availability is more important than the numeric price/context winner.

Decision Notes
  • On the standard 1M input plus 500K output workload, Claude Sonnet 4 is estimated at $10.5 vs $15.5 for GPT-5.4 Image 2, saving $5 (32.3% lower).
  • Claude Sonnet 4 is $5 cheaper on the standard workload (32.3% lower).
  • Claude Sonnet 4 is $5 cheaper per 1M input tokens (62.5% lower; 2.67x difference).
  • Both models report the same output price at $15 per 1M tokens.
  • Claude Sonnet 4 has 728K more context (3.68x larger).
Head-to-Head Specs
FeatureClaude Sonnet 4
(Anthropic)		GPT-5.4 Image 2
(OpenAI)
Input Price
prompt tokens per 1M		$3$8
Completion Price
per 1M tokens		$15$15
Sample Workload Cost
1M input + 500K output		$10.5$15.5
Context Window1M272K
Release Date
Popularity#60#137

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionClaude Sonnet 4On the standard 1M input plus 500K output workload, Claude Sonnet 4 is estimated at $10.5 vs $15.5 for GPT-5.4 Image 2, saving $5 (32.3% lower).
High-volume input processingClaude Sonnet 4Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsTieLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workClaude Sonnet 4A 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 Sonnet 4 when lower sample workload cost matters most: $0.88.
  • Claude 3.5 Haiku can replace Claude Sonnet 4 when lower sample workload cost matters most: $2.8.
  • Anthropic Claude Haiku Latest can replace Claude Sonnet 4 when lower sample workload cost matters most: $3.5.
  • Claude Haiku 4.5 can replace Claude Sonnet 4 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 offers 2M context with $2.5 sample workload cost.
  • Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
  • GPT-5.4 offers 1.05M context with $10 sample workload cost.

Cheaper alternatives

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

Open cheapest models

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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Anthropic catalog

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

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OpenAI catalog

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

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