GPT-6 AstravsGPT 5.5 Instant
GPT-6 Astra leads the overall Podium Score by 12.2 points (86.2 vs 74.0).Category wins: GPT-6 Astra 0 — 0 GPT 5.5 Instant.GPT 5.5 Instant is the cheaper pick ($10/M vs $50/M per 1M output tokens). GPT-6 Astra is faster (82 t/s vs 50 t/s).
Key VerdictAggregated 2026 Benchmark Analysis
GPT-6 Astra is rated higher overall with a Podium Score of 86.2 (vs 74.0 for GPT 5.5 Instant). Both models show closely matched capabilities across domain benchmarks.
Coding & Engineering
Comparable
Inference Speed
GPT-6 Astra (82 t/s)
Cost Efficiency
GPT 5.5 Instant ($10/M/M)
| Metric | GPT-6 Astra | GPT 5.5 Instant |
|---|---|---|
| Podium Score | 86.2 ▲ | 74.0 |
| Arena Elo | 1498 | — |
| Intelligence Index | 61.0 | — |
| Coding | 67.2 | — |
| Math | 97.6 | — |
| Reasoning | 96.0 | — |
| Agentic | 72.6 | — |
| Knowledge | 31.5 | — |
| Multimodal | 98.2 | — |
| Long-context | 100.0 | — |
| Output speed | 82 t/s ▲ | 50 t/s |
| Output price | $50/M | $10/M ▲ |
| Context window | 1100K ▲ | 128K |
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: GPT-6 Astra vs Claude Mythos · GPT-6 Astra vs Claude Fable 5 · GPT-6 Astra vs Claude Fable 5.1 · GPT-6 Astra vs Kimi K3