Gemini 4 Argon vs GPT-6 Astra
Different efforts: high · medium · Compare all at high
MMMU-Pro (vision) MMMU-Pro (vision): College-level questions that require understanding images: charts, diagrams, photos
Gemini 4 Argon—
GPT-6 Astra85.1
Chartography Chartography: Expert chart reasoning over professional scientific, medical, financial and engineering charts
Gemini 4 Argon71.6
GPT-6 Astra · max71
GDP.pdf · AA all-pass GDP.pdf · AA all-pass: Models reason over professional PDF documents; an attempt passes only when every atomic criterion passes
Gemini 4 Argon21.8
GPT-6 Astra30.4
Arena Document · overall Arena Document · overall: Human pairwise preferences in the stated document vote pool
Gemini 4 Argon—
GPT-6 Astra · max1,467.5
Arena Vision · overall Arena Vision · overall: Human pairwise preferences in the stated vision vote pool
Gemini 4 Argon—
GPT-6 Astra · max1,279.9
| Benchmark | Gemini 4 Argon | GPT-6 Astra |
|---|---|---|
| MMMU-Pro (vision) | — | 85.1 |
| Chartography | 71.6 | 71 · max |
| GDP.pdf · AA all-pass | 21.8 | 30.4 |
| Arena Document · overall | — | 1,467.5 · max |
| Arena Vision · overall | — | 1,279.9 · max |
Specs
| Spec | Gemini 4 Argon | GPT-6 Astra |
|---|---|---|
| Input, per 1M | !$2 | $10 |
| Output, per 1M | !$10 | $50 |
| Cost per task? | $1.99 | $1.54 |
| Speed, tok/s | 84 | 59 |
| Context | 1M | 1.05M |
| Weights | Closed | Closed |
| Released | Oct 2026 | Sep 2026 |
| See images | ✓ | ✓ |
| Read PDFs | ✓ | Partial |
| Hear audio | ✓ | — |
| Watch video | ✓ | — |
| Call tools | ✓ | ✓ |
| Force a tool call | Partial | Partial |
| Return strict JSON | ✓ | ✓ |
| Search the web | ✓ | ✓ |
| Run code | ✓ | ✓ |
| Use a computer | ? | ✓ |
What breaks when you switch
Gemini 4 Argon → GPT-6 Astra
Monitoring can return HTTP 403›
Misalignment monitoring can return HTTP 403 before streaming or errors after output; match misalignment_policy_violation and handle stream errors.
No none reasoning effort›
The none reasoning effort is unsupported on GPT-6 Astra and GPT-6.1 Sol; use low instead.
Remove unsupported sampling parameters›
When reasoning effort is not none, remove temperature, top_p and top_logprobs, plus Chat Completions logprobs or Responses output logprobs inclusion.
GPT-6 Astra → Gemini 4 Argon
Context: 1.05M → 1M
Synchronous output stops at 65,536›
With background false, output limits above 65,536 tokens return HTTP 400; stay at or below that limit.
Sampling parameters are ignored›
temperature, top_p and top_k are ignored; remove them from requests.
No explicit caching›
Explicit caching is unavailable; omit explicit cache requests.