Claude Opus 5 vs gpt-oss-20b: Release Comparison
Comparison of the Claude Opus 5 and gpt-oss-20b releases: 5 and 2 models respectively, each with different intelligence, performance, and pricing characteristics. Below is a comparison of the key metrics across all 7 models.
- For intelligence, Claude Opus 5 scores highest: Claude Opus 5 (Adaptive Reasoning, Max Effort) at 51, against gpt-oss-20b (low) at 10 for gpt-oss-20b.
- For output speed, gpt-oss-20b is fastest: gpt-oss-20b (low) at 224 t/s, against Claude Opus 5 (Adaptive Reasoning, Medium Effort) at 57 t/s for Claude Opus 5.
- For cost per task, gpt-oss-20b is cheapest: gpt-oss-20b (high) at $0.01, against Claude Opus 5 (Adaptive Reasoning, Low Effort) at $1.10 for Claude Opus 5.
Releases compared
Intelligence
Artificial Analysis Intelligence Index
Intelligence Index vs. Cost per Intelligence Index Task
Cost per Task (USD, Log Scale)
Cost
Cost per Intelligence Index Task
Speed & Latency
Output Speed
Capability Scores
Capability Indexes
Incorporates 7 evaluations: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, Humanity's Last Exam, AutomationBench-AA, AA-LCR v1.1, GDP.pdf · Higher is better
Incorporates 6 evaluations: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, AutomationBench-AA, AA-LCR v1.1, GDP.pdf · Higher is better
Incorporates 7 evaluations: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, Humanity's Last Exam, AA-LCR v1.1, GDP.pdf, AutomationBench-AA · Higher is better
Incorporates 6 evaluations: AA-Omniscience, GDPval-AA v2.1, AA-Briefcase v1.1, MLCR-AA, Humanity's Last Exam, AutomationBench-AA · Higher is better
Incorporates 6 evaluations: AA-Omniscience, Humanity's Last Exam, CritPt, GDPval-AA v2.1, AA-Briefcase v1.1, Terminal-Bench 4.0 · Higher is better
Incorporates 5 evaluations: AA-Omniscience, Humanity's Last Exam, GDPval-AA v2.1, AA-Briefcase v1.1, AA-LCR v1.1 · Higher is better
Further details
Input modality | Output modality | Weights | Provider Benchmarks | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus 5 (Adaptive Reasoning, Max Effort) |  Anthropic | 51 | 55 | 57 | 57 | 53 | 54 | 61 | $5.86 | $3.9 | $5.00 | $25.00 | $0.50 | $7,275 | 73k | 43k | 140M | 55 | 62.61s | 62.61s | 71.71s | 804.00s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - |   | |
| Claude Opus 5 (Adaptive Reasoning, Xhigh Effort) | Anthropic | 50 | 54 | 54 | 56 | 53 | 53 | 60 | $4.88 | $3.9 | $5.00 | $25.00 | $0.50 | $5,868 | 61k | 35k | 111M | 54 | 26.58s | 26.58s | 35.92s | 724.44s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Opus 5 (Adaptive Reasoning, High Effort) | Anthropic | 48 | 51 | 53 | 54 | 52 | 52 | 58 | $3.61 | $3.9 | $5.00 | $25.00 | $0.50 | $4,332 | 46k | 25k | 81M | 55 | 16.08s | 16.08s | 25.14s | 517.71s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Opus 5 (Adaptive Reasoning, Medium Effort) | Anthropic | 45 | 49 | 51 | 52 | 50 | 47 | 56 | $2.19 | $3.9 | $5.00 | $25.00 | $0.50 | $2,732 | 29k | 15k | 49M | 57 | 5.20s | 5.20s | 13.99s | 314.21s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| Claude Opus 5 (Adaptive Reasoning, Low Effort) | Anthropic | 39 | 44 | 46 | 48 | 45 | 42 | 50 | $1.10 | $3.9 | $5.00 | $25.00 | $0.50 | $1,561 | 15k | 7k | 26M | 56 | 2.94s | 2.94s | 11.92s | 164.81s | - | 1M | Jul 2026 | - | Yes | Supports: text and image | Supports: text | Not available | - | | |
| gpt-oss-20b (low) |  OpenAI | 10 | - | - | - | - | - | - | - | $0.1 | $0.07 | $0.215 | - | - | - | - | - | 224 | 0.92s | 9.84s | 12.07s | - | 21B 3.6B active at inference time | 131k | Aug 2025 | May 2025 | Yes | Supports: text | Supports: text |    +4 | |||
| gpt-oss-20b (high) | OpenAI | 9 | 7 | 5 | 7 | 7 | 12 | 11 | $0.01 | $0.1 | $0.07 | $0.18 | - | $31 | 18k | 16k | 70M | 186 | 0.84s | 11.62s | 14.31s | 104.61s | 21B 3.6B active at inference time | 131k | Aug 2025 | May 2024 | Yes | Supports: text | Supports: text |  +5 | |||