Compare/OpenChat 3.5 (1210) vs gpt-oss-120B (low)

OpenChat 3.5 (1210)vsgpt-oss-120B (low)

Side-by-side comparison of pricing, 12 benchmarks, and generation speed.

OpenChat

OpenChat 3.5 (1210)

Input
$0/M
Output
$0/M
Speed
TTFT
OpenAI

gpt-oss-120B (low)

Input
$0.15/M
Output
$0.6/M
Speed
255 tok/s
TTFT
0.51s

Winner by Category

Cheaper
OpenChat 3.5 (1210)
Faster (tok/s)
gpt-oss-120B (low)
Lower Latency
OpenChat 3.5 (1210)
Benchmarks (1-11)
gpt-oss-120B (low)

Pricing Comparison

MetricOpenChat 3.5 (1210)gpt-oss-120B (low)
Input ($/M tokens)$0$0.15
Output ($/M tokens)$0$0.6
Cost for 1M input + 100K output tokens:
OpenChat 3.5 (1210)$0.00
gpt-oss-120B (low)$0.21

Speed Comparison

Output Speed (tokens/s) — higher is better
OpenChat 3.5 (1210)
gpt-oss-120B (low)
255 tok/s
Time to First Token (seconds) — lower is better
OpenChat 3.5 (1210)
gpt-oss-120B (low)
0.51s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
8.324.5
Coding Index
15.5
Math Index
66.7
GPQA Diamond
23.0%67.2%
MMLU-Pro
31.0%77.5%
LiveCodeBench
11.5%70.7%
AIME 2025
66.7%
MATH-500
30.7%
Humanity's Last Exam
4.8%5.2%
SciCode
36.0%
IFBench
58.3%
TerminalBench
5.3%
OpenChat 3.5 (1210)1 wins
11 winsgpt-oss-120B (low)

Frequently Asked Questions

Which is cheaper, OpenChat 3.5 (1210) or gpt-oss-120B (low)?

OpenChat 3.5 (1210) is cheaper overall. Its blended price (3:1 input/output ratio) is $0.00/M tokens vs $0.26/M for gpt-oss-120B (low).

Which model performs better on benchmarks?

gpt-oss-120B (low) wins 11 out of 12 benchmarks compared to 1 for OpenChat 3.5 (1210). See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

gpt-oss-120B (low) generates tokens faster at 255 tok/s vs 0 tok/s. OpenChat 3.5 (1210) also has lower time-to-first-token (0.00s vs 0.51s).

When should I use OpenChat 3.5 (1210) vs gpt-oss-120B (low)?

Choose based on your priorities: OpenChat 3.5 (1210) for lower cost, gpt-oss-120B (low) for stronger benchmark performance, and gpt-oss-120B (low) for faster generation. For latency-sensitive apps, check the TTFT comparison above.