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gpt-oss-120b vs Grok Latest

gpt-oss-120b

OpenAI

40#171
vs
Grok Latest

~x-ai

40#172
Signal-by-Signal Comparison
Signalgpt-oss-120bDeltaGrok Latest
Capabilities
67
-33
100
Benchmarks
46
+46
0
Pricing
100
+6
94
Context window size
73
-8
81
Recency
71
-29
100
Output Capacity
85
+65
20
Overall Result
3 wins
of 6
3 wins
It's a tie - both models win 3 signals each

Score History

Score History (21 data points)
gpt-oss-120bGrok Latest
gpt-oss-120b

40.1

current score

Leader

gpt-oss-120b

right now

Grok Latest

40

current score

LMMarketCap.com
Interactive Price Comparison
100Kcalls/month
1,000tokens (~1,333 chars)
500tokens (~667 chars)

gpt-oss-120b

OpenAI

Best Value
Per request$0.000105
Daily$0.35
Monthly$10.50
Annual$126.00

Grok Latest

~x-ai

Per request$0.005000
Daily$16.67
Monthly$500.00
Annual$6000.00

gpt-oss-120b saves you $489.50/month

That's $5874.00/year compared to Grok Latest at your current usage level of 100K calls/month.

98% cheaper
Choose gpt-oss-120b for cost optimization

gpt-oss-120b pricing:
Input:$0.03/M tokens
Output:$0.15/M tokens
Grok Latest pricing:
Input:$2.00/M tokens
Output:$6.00/M tokens
Winner
gpt-oss-120b

OpenAI

40

Composite Score

Grok Latest

~x-ai

40

Composite Score

Signal-by-Signal Comparison
Metricgpt-oss-120bGrok LatestWinner
Overall Score
40
40
gpt-oss-120b
Rank#171#172
gpt-oss-120b
Quality Rank#171#172
gpt-oss-120b
Adoption Rank#171#172
gpt-oss-120b
Parameters120B----
Context Window131K500K
Grok Latest
Pricing$0.03/$0.15/M$2.00/$6.00/M--
Signal Scores
Capabilities
67
100
Grok Latest
Benchmarks
46
--
gpt-oss-120b
Pricing
100
94
gpt-oss-120b
Context window size
73
81
Grok Latest
Recency
71
100
Grok Latest
Output Capacity
85
20
gpt-oss-120b
Benchmark Head-to-Head(2 benchmarks)
gpt-oss-120b: 0Grok Latest: 0
gpt-oss-120b
Grok Latest
Normalized 0-100%
SWE-bench Verified
26%-
Arena Elo
1353-
Benchmark Interpretation

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%). Learn more about our methodology.

gpt-oss-120bEntry Level

Scores 40/100 (rank #171), placing it in the top 41% of all 290 models tracked.

Raw Quality0/100
Cost Efficiency0/100
Speed0/100
Grok LatestEntry Level

Scores 40/100 (rank #172), placing it in the top 41% of all 290 models tracked.

Raw Quality0/100
Cost Efficiency0/100
Speed0/100

With only a 0-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.

When to Use Each Model

Choose gpt-oss-120b when you need:

  • High-volume production workloads where API costs must be minimized
  • Step-by-step reasoning and chain-of-thought problem solving
  • Self-hosted deployments where you need full control over the model

Choose Grok Latest when you need:

  • Processing long documents or large codebases (500K token context)
  • Multimodal workflows that require image understanding
  • Step-by-step reasoning and chain-of-thought problem solving
Cost-Performance Analysis
gpt-oss-120bBest Value
Input cost$0.03/M tokens
Output cost$0.15/M tokens
Cost per quality point$0.004
Est. monthly (1M tokens/day)$2.70
Grok Latest
Input cost$2.00/M tokens
Output cost$6.00/M tokens
Cost per quality point$0.200
Est. monthly (1M tokens/day)$120.00

gpt-oss-120b offers 98% better value per quality point. At 1M tokens/day, you'd spend $2.70/month with gpt-oss-120b vs $120.00/month with Grok Latest - a $117.30 monthly difference.

Latency & Speed
gpt-oss-120bFaster
Speed score0/100
Grok Latest
Speed score0/100

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.

Example Use Cases

Code generation & review

Based on overall model capabilities and architecture for coding tasks like generating functions, debugging, and refactoring

gpt-oss-120b

Customer support chatbot

Suitable for user-facing chat with competitive response times. gpt-oss-120b also offers lower per-token costs for high-volume support

gpt-oss-120b

Long document analysis

Larger context window (500K tokens) can process longer documents, contracts, and research papers in a single pass

Grok Latest

Batch data extraction

Lower output pricing ($0.15/M) reduces costs when processing thousands of records daily

gpt-oss-120b

Creative writing & content

Higher overall composite score (40/100) correlates with better nuance, coherence, and style in long-form content

gpt-oss-120b

Image understanding & OCR

Supports vision input - can analyze screenshots, diagrams, photos, and scanned documents directly

Grok Latest
Which Should You Choose?
Our recommendation:
gpt-oss-120b

gpt-oss-120b and Grok Latest are extremely close in overall performance (only 0.10000000000000142 points apart). Your best choice depends entirely on which specific strengths matter most for your use case.

gpt-oss-120b
Recommended

by OpenAI

  • Choose for Quality - Marginally better benchmark scores; both are excellent
  • Choose for Cost - 98% lower pricing; better value at scale
  • Choose for Reliability - Higher uptime and faster response speeds
  • Choose for Prototyping - Stronger community support and better developer experience
  • Choose for Production - Wider enterprise adoption and proven at scale

by ~x-ai

Consider for specialized use cases.

Capability Comparison
Capabilitygpt-oss-120bGrok Latest
Vision (Image Input)differs
Function Calling
Streaming
JSON Mode
Reasoning
Web Searchdiffers
Image Output
Monthly Cost Calculator
1,000tokens (600 in / 400 out)
100requests/day (3,000/month)

gpt-oss-120b

OpenAI

Best Value
$0.2340
estimated monthly cost

Grok Latest

~x-ai

$10.80
estimated monthly cost

gpt-oss-120b saves you $10.57/month

That's 98% cheaper than Grok Latest 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.

Parameters & Context
Parametergpt-oss-120bGrok Latest
Context Window131K500K
Max Output Tokens131,072--
Open SourceYesNo
CreatedAug 5, 2025Jul 8, 2026
Last updated: 34m ago

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gpt-oss-120b vs Grok Latest (2026) | LM Market Cap