API cost decision in 10 seconds

gpt-oss-120b (free) vs KAT-Coder-Pro V2

Pick gpt-oss-120b (free) for lower cost; pick KAT-Coder-Pro V2 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-oss-120b (free) for lower cost; pick KAT-Coder-Pro V2 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, gpt-oss-120b (free) is estimated at $0 vs $0.9 for KAT-Coder-Pro V2, saving $0.9 (100% lower).

Cost-first pickgpt-oss-120b (free)
Context-first pickKAT-Coder-Pro V2
Sample savings$0.9100%
10x traffic gap$9

KAT-Coder-Pro V2 has more context, but gpt-oss-120b (free) saves $0.9 on the standard workload. At 10x that traffic, the same price gap is about $9. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

gpt-oss-120b (free) stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickgpt-oss-120b (free)KAT-Coder-Pro V2
Input-heavy / RAG5M input + 500K outputgpt-oss-120b (free)$0$2.1
Balanced workload1M input + 1M outputgpt-oss-120b (free)$0$1.5
Output-heavy chatbot1M input + 5M outputgpt-oss-120b (free)$0$6.3
Cheaper input gpt-oss-120b (free) $0 vs $0.3 / 1M

gpt-oss-120b (free) is free for input tokens while KAT-Coder-Pro V2 costs $0.3 per 1M tokens.

Cheaper output gpt-oss-120b (free) $0 vs $1.2 / 1M

gpt-oss-120b (free) is free for output tokens while KAT-Coder-Pro V2 costs $1.2 per 1M tokens.

Larger context KAT-Coder-Pro V2 131.07K vs 256K

KAT-Coder-Pro V2 has 124.93K more context (1.95x larger).

Sample workload gpt-oss-120b (free) $0 vs $0.9

gpt-oss-120b (free) is free for the standard workload while the other model is estimated at $0.9.

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
gpt-oss-120b (free) Calculating… Estimated API cost
KAT-Coder-Pro V2 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-oss-120b (free) has the lower input price; gpt-oss-120b (free) has the lower output price; KAT-Coder-Pro V2 offers the larger context window. For the 1M input plus 500K output sample, gpt-oss-120b (free) is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0 for gpt-oss-120b (free) and $0.9 for KAT-Coder-Pro V2.

Best Fit

Choose gpt-oss-120b (free) when you care most about lower input-token price, and lower output-token price.

Choose KAT-Coder-Pro V2 when you care most about larger context window.

Decision Notes
  • On the standard 1M input plus 500K output workload, gpt-oss-120b (free) is estimated at $0 vs $0.9 for KAT-Coder-Pro V2, saving $0.9 (100% lower).
  • gpt-oss-120b (free) is free for the standard workload while the other model is estimated at $0.9.
  • gpt-oss-120b (free) is free for input tokens while KAT-Coder-Pro V2 costs $0.3 per 1M tokens.
  • gpt-oss-120b (free) is free for output tokens while KAT-Coder-Pro V2 costs $1.2 per 1M tokens.
  • KAT-Coder-Pro V2 has 124.93K more context (1.95x larger).
Head-to-Head Specs
Featuregpt-oss-120b (free)
(OpenAI)		KAT-Coder-Pro V2
(Kwaipilot)
Input Price
prompt tokens per 1M		$0$0.3
Completion Price
per 1M tokens		$0$1.2
Sample Workload Cost
1M input + 500K output		$0$0.9
Context Window131.07K256K
Release Date
Popularity#29#117

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productiongpt-oss-120b (free)On the standard 1M input plus 500K output workload, gpt-oss-120b (free) is estimated at $0 vs $0.9 for KAT-Coder-Pro V2, saving $0.9 (100% lower).
High-volume input processinggpt-oss-120b (free)Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsgpt-oss-120b (free)Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workKAT-Coder-Pro V2A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps
  • No lower-cost same-provider swap is currently tracked for this pair.
Larger context near this budget
  • Llama 4 Scout offers 10M context with $0.23 sample workload cost.
  • Owl Alpha offers 1.05M context with $0 sample workload cost.
  • MiMo-V2.5 offers 1.05M context with $0.28 sample workload cost.
  • DeepSeek V4 Flash offers 1.05M context with $0.2 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

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OpenAI catalog

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

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Kwaipilot catalog

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

Open Kwaipilot models
gpt-oss-120b (free)

gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...

KAT-Coder-Pro V2

KAT-Coder-Pro V2 is the latest high-performance model in KwaiKAT’s KAT-Coder series, designed for complex enterprise-grade software engineering and SaaS integration. It builds on the agentic coding strengths of earlier versions,...