Comparing 6
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GPT-6 LunavsClaude Haiku 5.5vsGemini 3.8 FlashvsClaude Sonnet 5.5vsClaude Opus 5.5vsGPT-6 Astra
Send one prompt to every model and read the answers side by side, with speed and cost for each.
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Highlighted values are the best among your picks.
GPT-6 LunaOpen AINEW OpenAI's most efficient model for focused, high-volume tasks | Claude Haiku 5.5AnthropicNEW Fast Claude model for responsive assistance, classification, and lightweight agents | Gemini 3.8 FlashGoogle Google's most intelligent Flash model, engineered for long-horizon software engineering, autonomous agents, and complex enterprise workflows | Claude Sonnet 5.5AnthropicNEW Fast Claude model for everyday coding, agents, and knowledge work | Claude Opus 5.5AnthropicNEW Claude model for long-running agentic coding and knowledge work | GPT-6 AstraOpen AI GPT-6 Astra is OpenAI's most capable model for complex reasoning, coding, computer use, research, and document creation. | |
|---|---|---|---|---|---|---|
| Intelligence | ||||||
| Intelligence index | 38.1 | 43.4 | 40.9 | 56 | 57.6 | 52.7 |
| Price | ||||||
| Input, $ per 1M | $0.10 | $0.10 | $0.75 | $2 | $4 | $10 |
| Output, $ per 1M | $0.50 | $0.50 | $3.75 | $10 | $20 | $50 |
| Typical message (500 in / 250 out) | $0.00017 | $0.00017 | $0.0013 | $0.0035 | $0.0070 | $0.0175 |
| Repeated input, cached | $0.01 · 10× cheaper | $0.01 · 10× cheaper | $0.07 · 10× cheaper | $0.10 · 20× cheaper | $0.20 · 20× cheaper | $1 · 10× cheaper |
| Prompts over 200K tokens | $0.20 / $0.75 | Same price | Same price | Same price | Same price | $20 / $75 |
| Limits | ||||||
| Context window | 1.05M | 1M | 1.05M | 1M | 1M | 1.05M |
| Longest answer | 128K tokens | 128K tokens | 66K tokens | 128K tokens | 128K tokens | 128K tokens |
| Knowledge cutoff | May 2026 | Jun 2026 | Not published | Jun 2026 | Jun 2026 | Apr 2026 |
| What it can take and do | ||||||
| Accepts | TextImagePDF | TextImagePDF | TextImagePDFAudioVideo | TextImagePDF | TextImagePDF | TextImagePDF |
| Reasoning effort | Off · Low · Med · High · X-high · Max | Low · Med · High · X-high · Max | Low · Med · High | Low · Med · High · X-high · Max | Low · Med · High · X-high · Max | Low · Med · High · X-high · Max |
| Tool use | Yes | Yes | Yes | Yes | Yes | Yes |
| Guaranteed JSON output | Yes | Yes | Yes | Yes | Yes | Yes |
| Availability | ||||||
| Released | 22 Sept 2026 | 7 Oct 2026 | 2 Sept 2026 | 28 Sept 2026 | 22 Sept 2026 | 4 Sept 2026 |
| Open weights | No | No | No | No | No | No |
| API providers offering it | 36 | 33 | 29 | 34 | 36 | 35 |