API cost decision in 10 seconds

🔥gpt-oss-120b vs Voxtral Small 24B 2507

Pick gpt-oss-120b 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 gpt-oss-120b when budget and context both matter.

On the standard 1M input plus 500K output workload, gpt-oss-120b is estimated at $0.13 vs $0.25 for Voxtral Small 24B 2507, saving $0.12 (48.4% lower).

Cost-first pickgpt-oss-120b
Context-first pickgpt-oss-120b
Sample savings$0.1248.4%
10x traffic gap$1.21

gpt-oss-120b is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $1.21. 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 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickgpt-oss-120bVoxtral Small 24B 2507
Input-heavy / RAG5M input + 500K outputgpt-oss-120b$0.29$0.65
Balanced workload1M input + 1M outputgpt-oss-120b$0.22$0.4
Output-heavy chatbot1M input + 5M outputgpt-oss-120b$0.94$1.6
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 $0.3 / 1M

gpt-oss-120b is $0.12 cheaper per 1M output tokens (40% lower; 1.67x difference).

Larger context gpt-oss-120b 131.07K vs 32K

gpt-oss-120b has 99.07K more context (4.1x larger).

Sample workload gpt-oss-120b $0.13 vs $0.25

gpt-oss-120b is $0.12 cheaper on the standard workload (48.4% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
gpt-oss-120b Calculating… Estimated API cost
Voxtral Small 24B 2507 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; gpt-oss-120b 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 $0.25 for Voxtral Small 24B 2507.

Best Fit

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

Choose Voxtral Small 24B 2507 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, gpt-oss-120b is estimated at $0.13 vs $0.25 for Voxtral Small 24B 2507, saving $0.12 (48.4% lower).
  • gpt-oss-120b is $0.12 cheaper on the standard workload (48.4% lower).
  • gpt-oss-120b is $0.06 cheaper per 1M input tokens (61% lower; 2.56x difference).
  • gpt-oss-120b is $0.12 cheaper per 1M output tokens (40% lower; 1.67x difference).
  • gpt-oss-120b has 99.07K more context (4.1x larger).
Head-to-Head Specs
Feature🔥gpt-oss-120b
(OpenAI)		Voxtral Small 24B 2507
(Mistral)
Input Price
prompt tokens per 1M		$0.039$0.1
Completion Price
per 1M tokens		$0.18$0.3
Sample Workload Cost
1M input + 500K output		$0.13$0.25
Context Window131.07K32K
Release Date
Popularity#20

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 $0.25 for Voxtral Small 24B 2507, saving $0.12 (48.4% 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 workgpt-oss-120bA 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.
  • Mistral Nemo can replace Voxtral Small 24B 2507 when lower sample workload cost matters most: $0.04.
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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...

Voxtral Small 24B 2507

Voxtral Small is an enhancement of Mistral Small 3, incorporating state-of-the-art audio input capabilities while retaining best-in-class text performance. It excels at speech transcription, translation and audio understanding. Input audio...