GPT-OSS-20B
OpenAI · → text
Input$0.11 /M
Output$0.55 /M
← ModelsGPT-OSS-20BCodex Mini
GPT-OSS-20B vs Codex Mini
Compare GPT-OSS-20B from OpenAI and Codex Mini from OpenAI on key metrics including benchmarks, price, context length, and other model features. Access both models and hundreds of others through the AIHubMix API.
GPT-OSS-20BCodex Mini+ Add model · 2/4
Codex Mini
OpenAI · text, image → text
Only supports v1/responses API calls.https://docs.aihubmix.com/en/api/Responses-API codex-mini-latest is a fine-tuned version of o4-mini specifically for use in Codex CLI. For direct use in the API, we recommend starting with gpt-4.1.
Input$1.5 /M
Output$6 /M
Cache read$0.375 /M
Pricing & Specifications
Prices are per million tokens. Time to First Token and throughput are rolling averages measured on AIHubMix.
GPT-OSS-20B
Codex Mini
Input /M
$0.11
$1.5
Output /M
$0.55
$6
Cache read /M
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$0.375
Context length
0
NaN
Max output
0
0
Time to First Token
0.1 s
5.4 s
Throughput
2619.0 tok/s
49.5 tok/s
Modalities
textimage
Supported Parameters
API Formats
Released
August 5, 2025
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Promotional prices show the discounted rate; see each model page for promotion windows.
Activity Past 30 Days
Daily traffic served through AIHubMix — how demand for each model is trending.
GPT-OSS-20Bcodex-mini-latest
Tokens / day
-
Requests / day
-
Performance Past 3 Days
Measured on real AIHubMix traffic, hourly buckets. Gaps mean no traffic in that hour.
GPT-OSS-20Bcodex-mini-latest
Throughput (tok/s)
-
TTFT (s)
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Uptime (%)
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Cost calculator
Estimate your monthly bill for the same workload on each model.
GPT-OSS-20B
$14.85 /mo
Codex Mini
$180 /mo
Monthly = daily × 30. Discounted rates applied where a promotion is active.
FAQ
Which is cheaper: GPT-OSS-20B, Codex Mini?
GPT-OSS-20B: $0.55/M output tokens; Codex Mini: $6/M. Use the cost calculator above to estimate your own workload.
Which responds faster?
GPT-OSS-20B: 0.1s time to first token measured on AIHubMix; see the live performance charts above for how each model behaves across the day.
Which one generates tokens faster?
GPT-OSS-20B at 2619.0 tok/s and Codex Mini at 49.5 tok/s, measured as output throughput on AIHubMix — a separate metric from time to first token.
Can I call GPT-OSS-20B and Codex Mini with the same API key?
Yes. AIHubMix serves every model on this page behind one OpenAI-compatible endpoint, so switching between them is a one-line change to the model field — no second account, key or SDK.
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