GPT-6 Astra (xhigh)vsFLUX.2 Klein 4B
GPT-6 Astra (xhigh) leads the overall Podium Score by 0.5 points (87.0 vs 86.5).Category wins: GPT-6 Astra (xhigh) 4 — 0 FLUX.2 Klein 4B.FLUX.2 Klein 4B is the cheaper pick ($0.01/M vs $50/M per 1M output tokens). FLUX.2 Klein 4B is faster (90 t/s vs 76 t/s).
GPT-6 Astra (xhigh)Drag slider or hover to compareFLUX.2 Klein 4B
Quick VerdictAggregated 2026 Benchmark Analysis
GPT-6 Astra (xhigh) is rated higher overall with a Podium Score of 87.0 (vs 86.5 for FLUX.2 Klein 4B). In head-to-head domain evaluations, GPT-6 Astra (xhigh) outperforms in 4 of 7 benchmark categories.
Coding & Engineering
GPT-6 Astra (xhigh) (60.0)
Inference Speed
FLUX.2 Klein 4B (90 t/s)
Cost Efficiency
FLUX.2 Klein 4B ($0.01/M)
API Price / 1M (in · out)
GPT-6 Astra (xhigh) $10/M · $50/M — FLUX.2 Klein 4B $0.01/M · $0.01/M
Choose GPT-6 Astra (xhigh) for vision and multimodal apps, and FLUX.2 Klein 4B for cost-sensitive workloads.
| Metric | GPT-6 Astra (xhigh) | FLUX.2 Klein 4B |
|---|---|---|
| Podium Score | 87.0 ▲ | 86.5 |
| Arena Elo | — | 1380 |
| Intelligence Index | — | 87.0 |
| Coding | 60.0 ▲ | 0.0 |
| Math | — | 0.0 |
| Reasoning | 90.0 ▲ | 25.0 |
| Agentic | — | 18.0 |
| Knowledge | 45.0 ▲ | 42.0 |
| Multimodal | 95.0 ▲ | 90.0 |
| Long-context | — | 35.0 |
| Output speed | 76 t/s | 90 t/s ▲ |
| Output price | $50/M | $0.01/M ▲ |
| Context window | 1100K ▲ | 32K |
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: GPT-6 Astra (xhigh) vs Claude Mythos · GPT-6 Astra (xhigh) vs Claude 5.5 Sonnet · GPT-6 Astra (xhigh) vs Kimi K3.1 Pro · GPT-6 Astra (xhigh) vs Eleven Multilingual v3