Claude Opus 5.5 (low), Claude Code vs. GPT-5.6 Sol (medium), Codex
Claude Opus 5.5 (low), Claude Code against GPT-5.6 Sol (medium), Codex: Geospatial Agent Index, each evaluation, cost, time and tokens, on the same tasks and limits. The harnesses differ, so part of any gap can come from the harness. Methodology.
Side by side
| Metric | Claude Opus 5.5 (low), Claude Code | GPT-5.6 Sol (medium), Codex |
|---|---|---|
| Geospatial Agent Index: Text only | 74 | 100 |
| Geospatial Agent Index: Text + vision | 78 | No data |
| Earth-Bench V2 score | 59 | No data |
| GeoBenchX score | 77 | No data |
| GS-QA2 score | 86 | 100 |
| Vision agents score | 89 | No data |
| GeoAgentBench score (Guided workflows; not in the Agent Index) | 96 | No data |
| GeoAnalystBench score (Guided workflows; not in the Agent Index) | 100 | No data |
| OGD4All score (standalone; in no index) | 95 | No data |
| GeoNatureAgent score (standalone; in no index) | 100 | No data |
| MultiGlobeQA score (standalone; in no index) | 79 | No data |
| GeoAgentEval score (standalone; in no index) | 100 | No data |
| Remote sensing and raster analysis score | 79 | 100 |
| GIS analysis score | 84 | No data |
| Climate and time series score | 59 | No data |
| Spatial statistics score | 77 | No data |
| Making maps score | 77 | No data |
| Recognising infeasible requests score | 77 | No data |
| Cost per task | $0.081 | $0.060 |
| Time per task (at 100 output tokens/s) | 0.4 min | 0.2 min |
| Tokens per attempt | 63k | 66k |
| Turns per attempt | 3.5 | 6.1 |
| Input price per 1M tokens | $4.00 | $4.00 |
| Output price per 1M tokens | $20.00 | $20.00 |
| Context window | 1,000,000 | 1,050,000 |
| Image input | Yes | Yes |
| Developer | Anthropic | OpenAI |
Charts
Not yet ranked. GPT-5.6 Sol (medium), Codex: no Earth-Bench V2 or GeoBenchX score yet. Grey placeholders mark these entries in the index, cost and output token charts; their height is not a value. Bars appear once it has a score on every index evaluation. Results so far are in the side-by-side table.
Geospatial Agent Index
Equal average of Earth-Bench V2, GeoBenchX and GS-QA2, 0 to 100 · Higher is better
Data table: Geospatial Agent Index
| Model | Developer | Geospatial Agent Index |
|---|---|---|
| Claude Opus 5.5 (low), Claude Code | Anthropic | 74 |
Cost per task
Average cost per task (USD) · Lower is better
How to read this chart
Not shown: not yet ranked. 1 entry: no Earth-Bench V2 or GeoBenchX score yet. Every entry is on the models page.
Data table: Cost per task
| Model | Developer | Cost per task |
|---|---|---|
| Claude Opus 5.5 (low), Claude Code | Anthropic | $0.081 |
Output tokens per task
Average output tokens per attempt, reasoning included · Lower is better
How to read this chart
Not shown: not yet ranked. 1 entry: no Earth-Bench V2 or GeoBenchX score yet. Every entry is on the models page.
Data table: Output tokens per task
| Model | Developer | Output tokens per task |
|---|---|---|
| Claude Opus 5.5 (low), Claude Code | Anthropic | 1k |
Frequently asked questions
Which scores higher on the Geospatial Agent Index, Claude Opus 5.5 (low), Claude Code or GPT-5.6 Sol (medium), Codex?
Which is cheaper per task, Claude Opus 5.5 (low), Claude Code or GPT-5.6 Sol (medium), Codex?
Which writes fewer output tokens per task, Claude Opus 5.5 (low), Claude Code or GPT-5.6 Sol (medium), Codex?
Which has the larger context window, Claude Opus 5.5 (low), Claude Code or GPT-5.6 Sol (medium), Codex?
More: Claude Opus 5.5 (low), Claude Code · GPT-5.6 Sol (medium), Codex · All comparisons