| Signal | gpt-oss-120b | Delta | Mercury 2 |
|---|---|---|---|
Capabilities | 67 | -- | |
Benchmarks | 61 | +1 | |
Pricing | 0 | -1 | |
Context window size | 81 | +0 | |
Recency | 89 | -11 | |
Output Capacity | 20 | -58 | |
| Overall Result | 2 wins | of 6 | 3 wins |
13
days higher
3
days
14
days higher
OpenAI
Inception
gpt-oss-120b saves you $49.10/month
That's $589.20/year compared to Mercury 2 at your current usage level of 100K calls/month.
| Metric | gpt-oss-120b | Mercury 2 | Winner |
|---|---|---|---|
| Overall Score | 62 | 61 | gpt-oss-120b |
| Rank | #92 | #94 | gpt-oss-120b |
| Quality Rank | #92 | #94 | gpt-oss-120b |
| Adoption Rank | #92 | #94 | gpt-oss-120b |
| Parameters | 120B | -- | -- |
| Context Window | 131K | 128K | gpt-oss-120b |
| Pricing | $0.04/$0.19/M | $0.25/$0.75/M | -- |
| Signal Scores | |||
| Capabilities | 67 | 67 | gpt-oss-120b |
| Benchmarks | 61 | 60 | gpt-oss-120b |
| Pricing | 0 | 1 | Mercury 2 |
| Context window size | 81 | 81 | gpt-oss-120b |
| Recency | 89 | 100 | Mercury 2 |
| Output Capacity | 20 | 78 | Mercury 2 |
Our score (0-100) is driven by benchmark performance (90%) from Arena Elo ratings, MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations. Capabilities and context window serve as tiebreakers (10%). Here's what the scores mean for these two models:
Scores 62/100 (rank #92), placing it in the top 69% of all 290 models tracked.
Scores 61/100 (rank #94), placing it in the top 68% of all 290 models tracked.
With only a 1-point gap, these models are in the same performance tier. The practical difference in output quality is minimal - your choice should depend on pricing, latency requirements, and specific feature needs.
gpt-oss-120b offers 77% better value per quality point. At 1M tokens/day, you'd spend $3.44/month with gpt-oss-120b vs $15.00/month with Mercury 2 - a $11.56 monthly difference.
Both models have comparable response speeds. For most applications, the latency difference is negligible.
When latency matters most: Interactive chatbots, IDE code completion, real-time translation, and user-facing applications where response time directly impacts experience. For batch processing, background summarization, or offline analysis, latency is less critical.
Code generation & review
Higher benchmark score (0/100) indicates stronger performance on coding tasks like generating functions, debugging, and refactoring
Customer support chatbot
Faster response time (speed score 0/100) is critical for user-facing chat. gpt-oss-120b also offers lower per-token costs for high-volume support
Long document analysis
Larger context window (131K tokens) can process longer documents, contracts, and research papers in a single pass
Batch data extraction
Lower output pricing ($0.19/M) reduces costs when processing thousands of records daily
Creative writing & content
Higher overall composite score (62/100) correlates with better nuance, coherence, and style in long-form content
gpt-oss-120b and Mercury 2 are extremely close in overall performance (only 0.8999999999999986 points apart). Your best choice depends entirely on which specific strengths matter most for your use case.
Best for Quality
gpt-oss-120b
Marginally better benchmark scores; both are excellent
Best for Cost
gpt-oss-120b
77% lower pricing; better value at scale
Best for Reliability
gpt-oss-120b
Higher uptime and faster response speeds
Best for Prototyping
gpt-oss-120b
Stronger community support and better developer experience
Best for Production
gpt-oss-120b
Wider enterprise adoption and proven at scale
by OpenAI
| Capability | gpt-oss-120b | Mercury 2 |
|---|---|---|
| Vision (Image Input) | ||
| Function Calling | ||
| Streaming | ||
| JSON Mode | ||
| Reasoning | ||
| Web Search | ||
| Image Output |
OpenAI
Inception
gpt-oss-120b saves you $1.05/month
That's 78% cheaper than Mercury 2 at 1,000 tokens/request and 100 requests/day.
Assumes 60% input / 40% output token ratio per request. Actual costs may vary based on your usage pattern.
| Parameter | gpt-oss-120b | Mercury 2 |
|---|---|---|
| Context Window | 131K | 128K |
| Max Output Tokens | -- | 50,000 |
| Open Source | Yes | No |
| Created | Aug 5, 2025 | Mar 4, 2026 |
gpt-oss-120b scores 62/100 (rank #92) compared to Mercury 2's 61/100 (rank #94), giving it a 1-point advantage. gpt-oss-120b is the stronger overall choice, though Mercury 2 may excel in specific areas like certain benchmarks.
gpt-oss-120b is ranked #92 and Mercury 2 is ranked #94 out of 290+ AI models. Rankings use a composite score combining benchmark performance (90%) from MMLU, GPQA, HumanEval, SWE-bench, and 15+ standardized evaluations, with capabilities and context window as tiebreakers (10%). Scores update hourly.
gpt-oss-120b is cheaper at $0.19/M output tokens vs Mercury 2's $0.75/M output tokens - 3.9x more expensive. Input token pricing: gpt-oss-120b at $0.04/M vs Mercury 2 at $0.25/M.
gpt-oss-120b has a larger context window of 131,072 tokens compared to Mercury 2's 128,000 tokens. A larger context window means the model can process longer documents and conversations.