API cost decision in 10 seconds

New🔥Ox Alpha vs GPT-5.5

Pick Ox Alpha for lower cost; pick GPT-5.5 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 Ox Alpha for lower cost; pick GPT-5.5 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Ox Alpha is estimated at $0 vs $20 for GPT-5.5, saving $20 (100% lower).

Cost-first pickOx Alpha
Context-first pickGPT-5.5
Sample savings$20100%
10x traffic gap$200

GPT-5.5 has more context, but Ox Alpha saves $20 on the standard workload. At 10x that traffic, the same price gap is about $200. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Ox Alpha stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickOx AlphaGPT-5.5
Input-heavy / RAG5M input + 500K outputOx Alpha$0$40
Balanced workload1M input + 1M outputOx Alpha$0$35
Output-heavy chatbot1M input + 5M outputOx Alpha$0$155
Cheaper input Ox Alpha $0 vs $5 / 1M

Ox Alpha is free for input tokens while GPT-5.5 costs $5 per 1M tokens.

Cheaper output Ox Alpha $0 vs $30 / 1M

Ox Alpha is free for output tokens while GPT-5.5 costs $30 per 1M tokens.

Larger context GPT-5.5 1.05M vs 1.05M

GPT-5.5 has 1.42K more context (1x larger).

Sample workload Ox Alpha $0 vs $20

Ox Alpha is free for the standard workload while the other model is estimated at $20.

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Ox Alpha Calculating… Estimated API cost
GPT-5.5 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

Ox Alpha has the lower input price; Ox Alpha has the lower output price; GPT-5.5 offers the larger context window. For the 1M input plus 500K output sample, Ox Alpha is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0 for Ox Alpha and $20 for GPT-5.5.

Best Fit

Choose Ox Alpha when you care most about lower input-token price, and lower output-token price.

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

Decision Notes
  • On the standard 1M input plus 500K output workload, Ox Alpha is estimated at $0 vs $20 for GPT-5.5, saving $20 (100% lower).
  • Ox Alpha is free for the standard workload while the other model is estimated at $20.
  • Ox Alpha is free for input tokens while GPT-5.5 costs $5 per 1M tokens.
  • Ox Alpha is free for output tokens while GPT-5.5 costs $30 per 1M tokens.
  • GPT-5.5 has 1.42K more context (1x larger).
Head-to-Head Specs
FeatureNew🔥Ox Alpha
(stealth)		GPT-5.5
(OpenAI)
Input Price
prompt tokens per 1M		$0$5
Completion Price
per 1M tokens		$0$30
Sample Workload Cost
1M input + 500K output		$0$20
Context Window1.05M1.05M
Release Date
Popularity#4

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionOx AlphaOn the standard 1M input plus 500K output workload, Ox Alpha is estimated at $0 vs $20 for GPT-5.5, saving $20 (100% lower).
High-volume input processingOx AlphaLower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsOx AlphaLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workGPT-5.5A 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-5.5 when lower sample workload cost matters most: $0.
  • gpt-oss-20b (free) can replace GPT-5.5 when lower sample workload cost matters most: $0.
  • gpt-oss-20b can replace GPT-5.5 when lower sample workload cost matters most: $0.1.
  • gpt-oss-120b can replace GPT-5.5 when lower sample workload cost matters most: $0.12.

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.

Open provider hubs

stealth catalog

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

Open stealth models

OpenAI catalog

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

Open OpenAI models
Ox Alpha

Ox Alpha is a reasoning model designed for coding, sustained agentic work, and production workloads. It is suited for long-horizon software engineering, complex reasoning, and workflows that combine text with...

GPT-5.5

GPT-5.5 is OpenAI’s frontier model designed for complex professional workloads, building on GPT-5.4 with stronger reasoning, higher reliability, and improved token efficiency on hard tasks. It features a 1M+ token...