API cost decision in 10 seconds

🔥gpt-oss-120b vs 🔥Gemini 2.5 Flash Lite

Pick gpt-oss-120b for lower cost; pick Gemini 2.5 Flash Lite only if the larger context window matters more.

Pricing data updated:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick gpt-oss-120b for lower cost; pick Gemini 2.5 Flash Lite only if the larger context window matters more.

On the standard 1M input plus 500K output workload, gpt-oss-120b is estimated at $0.13 vs $0.3 for Gemini 2.5 Flash Lite, saving $0.17 (57% lower).

Cost-first pickgpt-oss-120b
Context-first pickGemini 2.5 Flash Lite
Sample savings$0.1757%
10x traffic gap$1.71

Gemini 2.5 Flash Lite has more context, but gpt-oss-120b saves $0.17 on the standard workload. At 10x that traffic, the same price gap is about $1.71. Use the calculator below to replace the sample workload with your own token volume.

Cheaper input gpt-oss-120b $0.039 vs $0.1 / 1M

gpt-oss-120b is $0.06 cheaper per 1M input tokens (61% lower; 2.56x difference).

Cheaper output gpt-oss-120b $0.18 vs $0.4 / 1M

gpt-oss-120b is $0.22 cheaper per 1M output tokens (55% lower; 2.22x difference).

Larger context Gemini 2.5 Flash Lite 131.07K vs 1.05M

Gemini 2.5 Flash Lite has 917.5K more context (8x larger).

Sample workload gpt-oss-120b $0.13 vs $0.3

gpt-oss-120b is $0.17 cheaper on the standard workload (57% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
gpt-oss-120b Calculating… Estimated API cost
Gemini 2.5 Flash Lite 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 has the lower input price; gpt-oss-120b has the lower output price; Gemini 2.5 Flash Lite offers the larger context window. For the 1M input plus 500K output sample, gpt-oss-120b is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0.13 for gpt-oss-120b and $0.3 for Gemini 2.5 Flash Lite.

Best Fit

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

Choose Gemini 2.5 Flash Lite when you care most about larger context window.

Decision Notes
  • On the standard 1M input plus 500K output workload, gpt-oss-120b is estimated at $0.13 vs $0.3 for Gemini 2.5 Flash Lite, saving $0.17 (57% lower).
  • gpt-oss-120b is $0.17 cheaper on the standard workload (57% lower).
  • gpt-oss-120b is $0.06 cheaper per 1M input tokens (61% lower; 2.56x difference).
  • gpt-oss-120b is $0.22 cheaper per 1M output tokens (55% lower; 2.22x difference).
  • Gemini 2.5 Flash Lite has 917.5K more context (8x larger).
Head-to-Head Specs
Feature🔥gpt-oss-120b
(OpenAI)		🔥Gemini 2.5 Flash Lite
(Google)
Input Price
prompt tokens per 1M		$0.039$0.1
Completion Price
per 1M tokens		$0.18$0.4
Sample Workload Cost
1M input + 500K output		$0.13$0.3
Context Window131.07K1.05M
Release Date
Popularity Rank
current rank		#16#17

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productiongpt-oss-120bOn the standard 1M input plus 500K output workload, gpt-oss-120b is estimated at $0.13 vs $0.3 for Gemini 2.5 Flash Lite, saving $0.17 (57% lower).
High-volume input processinggpt-oss-120bLower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsgpt-oss-120bLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workGemini 2.5 Flash LiteA 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-oss-120b when lower sample workload cost matters most: $0.
  • gpt-oss-20b (free) can replace gpt-oss-120b when lower sample workload cost matters most: $0.
  • gpt-oss-20b can replace gpt-oss-120b when lower sample workload cost matters most: $0.1.
  • Gemma 4 26B A4B (free) can replace Gemini 2.5 Flash Lite when lower sample workload cost matters most: $0.
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.

Cheaper alternatives

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Larger context alternatives

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Provider catalogs

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OpenAI catalog

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Google catalog

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gpt-oss-120b

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...

Gemini 2.5 Flash Lite

Gemini 2.5 Flash-Lite is a lightweight reasoning model in the Gemini 2.5 family, optimized for ultra-low latency and cost efficiency. It offers improved throughput, faster token generation, and better performance...