API cost decision in 10 seconds

Claude Opus 4.6 (Fast) vs GPT Audio

Pick GPT Audio for lower cost; pick Claude Opus 4.6 (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 Audio for lower cost; pick Claude Opus 4.6 (Fast) only if the larger context window matters more.

On the standard 1M input plus 500K output workload, GPT Audio is estimated at $7.5 vs $105 for Claude Opus 4.6 (Fast), saving $97.5 (92.9% lower).

Cost-first pickGPT Audio
Context-first pickClaude Opus 4.6 (Fast)
Sample savings$97.592.9%
10x traffic gap$975

Claude Opus 4.6 (Fast) has more context, but GPT Audio saves $97.5 on the standard workload. At 10x that traffic, the same price gap is about $975. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

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

Workload shapeToken mixBetter pickClaude Opus 4.6 (Fast)GPT Audio
Input-heavy / RAG5M input + 500K outputGPT Audio$225$17.5
Balanced workload1M input + 1M outputGPT Audio$180$12.5
Output-heavy chatbot1M input + 5M outputGPT Audio$780$52.5
Cheaper input GPT Audio $30 vs $2.5 / 1M

GPT Audio is $27.5 cheaper per 1M input tokens (91.7% lower; 12x difference).

Cheaper output GPT Audio $150 vs $10 / 1M

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

Larger context Claude Opus 4.6 (Fast) 1M vs 128K

Claude Opus 4.6 (Fast) has 872K more context (7.81x larger).

Sample workload GPT Audio $105 vs $7.5

GPT Audio is $97.5 cheaper on the standard workload (92.9% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Claude Opus 4.6 (Fast) Calculating… Estimated API cost
GPT Audio 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 Audio has the lower input price; GPT Audio has the lower output price; Claude Opus 4.6 (Fast) offers the larger context window. For the 1M input plus 500K output sample, GPT Audio is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $105 for Claude Opus 4.6 (Fast) and $7.5 for GPT Audio.

Best Fit

Choose Claude Opus 4.6 (Fast) when you care most about larger context window.

Choose GPT Audio 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 Audio is estimated at $7.5 vs $105 for Claude Opus 4.6 (Fast), saving $97.5 (92.9% lower).
  • GPT Audio is $97.5 cheaper on the standard workload (92.9% lower).
  • GPT Audio is $27.5 cheaper per 1M input tokens (91.7% lower; 12x difference).
  • GPT Audio is $140 cheaper per 1M output tokens (93.3% lower; 15x difference).
  • Claude Opus 4.6 (Fast) has 872K more context (7.81x larger).
Head-to-Head Specs
FeatureClaude Opus 4.6 (Fast)
(Anthropic)		GPT Audio
(OpenAI)
Input Price
prompt tokens per 1M		$30$2.5
Completion Price
per 1M tokens		$150$10
Sample Workload Cost
1M input + 500K output		$105$7.5
Context Window1M128K
Release Date

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionGPT AudioOn the standard 1M input plus 500K output workload, GPT Audio is estimated at $7.5 vs $105 for Claude Opus 4.6 (Fast), saving $97.5 (92.9% lower).
High-volume input processingGPT AudioLower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsGPT AudioLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workClaude Opus 4.6 (Fast)A 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 4.6 (Fast) when lower sample workload cost matters most: $0.88.
  • Claude 3.5 Haiku can replace Claude Opus 4.6 (Fast) when lower sample workload cost matters most: $2.8.
  • Anthropic Claude Haiku Latest can replace Claude Opus 4.6 (Fast) when lower sample workload cost matters most: $3.5.
  • Claude Haiku 4.5 can replace Claude Opus 4.6 (Fast) 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.

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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Claude Opus 4.6 (Fast)

Fast-mode variant of [Opus 4.6](/anthropic/claude-opus-4.6) - 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

GPT Audio

The gpt-audio model is OpenAI's first generally available audio model. The new snapshot features an upgraded decoder for more natural sounding voices and maintains better voice consistency. Audio is priced...