Terminus-2 – Gemma 4 26B A4B (thinking on) vs. Codex – gpt-oss-20b (high): geospatial agent comparison
Comparison between Terminus-2 – Gemma 4 26B A4B (thinking on) and Codex – gpt-oss-20b (high) on the Geospatial Agent Index, each benchmark, cost, time and token use, from the same tasks, agent and limits. Methodology.
Side by side
| Metric | Terminus-2 – Gemma 4 26B A4B (thinking on) | Codex – gpt-oss-20b (high) |
|---|---|---|
| Geospatial Agent Index | 51* (partial: attempt 1 on 530 of 565 tasks) | 4* (partial: attempt 1 on 173 of 565 tasks) |
| Earth-Bench V2 score | 39 | 0 |
| GeoBenchX score | 55 | 8 |
| GS-QA2 score | 59 | No data |
| GeoAgentBench score (guided GIS workflow; outside the index) | 86 | No data |
| GeoAnalystBench score (guided GIS workflow; outside the index) | 63 | No data |
| Raster and remote sensing score | 55 | 0 |
| Vector and overlay score | 54 | 25 |
| Networks and routing score | No data | No data |
| Climate and time series score | 46 | 0 |
| Spatial statistics and interpolation score | 29 | 0 |
| Mapping and cartography score | 68 | 4 |
| Recognising infeasible requests score | 48 | 12 |
| Cost per task | $0.021 | $0.140 |
| Time per task | 14.6 min | 8.0 min |
| Tokens per attempt | 167k | 683k |
| Turns per attempt | 13.7 | 29.5 |
| Attempts decided | 530 | 170 |
| Input price per 1M tokens | $0.10 | $0.20 |
| Output price per 1M tokens | $0.30 | $0.30 |
| Context window | 256,000 | 128,000 |
| Image input | Yes | No |
| Developer | OpenAI |
Charts
Partial coverage. Terminus-2 – Gemma 4 26B A4B (thinking on): 210 of 245 GS-QA2 tasks; Codex – gpt-oss-20b (high): 32 of 147 Earth-Bench V2 tasks; 141 of 173 GeoBenchX tasks; GS-QA2 incomplete. Grey placeholders identify these entries in the index, cost and output token charts; their height does not represent a value. Comparable bars appear when first-attempt coverage is complete. Their available results remain in the side-by-side table.
Geospatial Agent Index
Equal-weight average of the evaluation scores, 0 to 100 · Higher is better
First eight selected entries in metric order. Full results in table view.
Data table: Geospatial Agent Index
| Model | Creator | Geospatial Agent Index | Range while attempts are pending | Benchmarks covered | Coverage (attempts) |
|---|
Cost per task
Average cost per task (USD) · Lower is better
First eight selected entries in metric order. Full results in table view.
How to read this chart
Not shown: partial coverage. Terminus-2 – Gemma 4 26B A4B (thinking on), Codex – gpt-oss-20b (high).
Data table: Cost per task
| Model | Creator | Cost per task | Coverage (attempts) |
|---|
Output tokens per task
Average output tokens per attempt, reasoning included · Lower is better
First eight selected entries in metric order. Full results in table view.
How to read this chart
Not shown: partial coverage. Terminus-2 – Gemma 4 26B A4B (thinking on), Codex – gpt-oss-20b (high).
Data table: Output tokens per task
| Model | Creator | Output tokens per task | Coverage (attempts) |
|---|
Frequently asked questions
Which scores higher on the Geospatial Agent Index, Terminus-2 – Gemma 4 26B A4B (thinking on) or Codex – gpt-oss-20b (high)?
Which is cheaper per task, Terminus-2 – Gemma 4 26B A4B (thinking on) or Codex – gpt-oss-20b (high)?
Which writes fewer output tokens per task, Terminus-2 – Gemma 4 26B A4B (thinking on) or Codex – gpt-oss-20b (high)?
Which has the larger context window, Terminus-2 – Gemma 4 26B A4B (thinking on) or Codex – gpt-oss-20b (high)?
More: Terminus-2 – Gemma 4 26B A4B (thinking on) · Codex – gpt-oss-20b (high) · all comparisons