Claude Opus 5 (Fast) alternatives
Ranked by capability overlap, similar context window, and similar price tier. Cross-vendor options are weighted higher than same-provider alternatives.
See also: Claude Opus 5 (Fast) model details · Anthropic provider page
Top 15 alternatives
| # | Model | Provider | Why | Context | Input price / 1M | Compare |
|---|---|---|---|---|---|---|
| 1 | OpenAI: GPT-5.5 | OpenAI | shares reasoning, tool-use, structured-output, vision · similar price tier | 1.1M Ultra context (1M+) | $5.00 Standard | vs → |
| 2 | OpenAI: GPT-5.6 Sol | OpenAI | shares reasoning, tool-use, structured-output, vision · similar price tier | 1.1M Ultra context (1M+) | $5.00 Standard | vs → |
| 3 | OpenAI: GPT-5.6 Sol Pro | OpenAI | shares reasoning, tool-use, structured-output, vision · similar price tier | 1.1M Ultra context (1M+) | $5.00 Standard | vs → |
| 4 | Anthropic: Claude Fable Latest | ~anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $10.00 Premium | vs → |
| 5 | Anthropic: Claude Opus Latest | ~anthropic | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $5.00 Standard | vs → |
| 6 | OpenAI GPT Latest | ~openai | shares reasoning, tool-use, structured-output, vision · similar price tier | 1.1M Ultra context (1M+) | $5.00 Standard | vs → |
| 7 | Sakana: Fugu Ultra | Sakana | shares reasoning, tool-use, structured-output, vision · similar price tier | 1M Ultra context (1M+) | $5.00 Standard | vs → |
| 8 | OpenAI: GPT-5 Pro | OpenAI | shares reasoning, tool-use, structured-output, vision · similar price tier | 400K Long context (128K+) | $15.00 Premium | vs → |
| 9 | OpenAI: o1 | OpenAI | shares reasoning, tool-use, structured-output, vision · similar price tier | 200K Long context (128K+) | $15.00 Premium | vs → |
| 10 | OpenAI: o3 Deep Research | OpenAI | shares reasoning, tool-use, structured-output, vision · similar price tier | 200K Long context (128K+) | $10.00 Premium | vs → |
| 11 | Google: Gemini 2.5 Flash | shares reasoning, tool-use, structured-output, vision · similar context window | 1.0M Ultra context (1M+) | $0.30 Budget | vs → | |
| 12 | Google: Gemini 2.5 Flash Lite | shares reasoning, tool-use, structured-output, vision · similar context window | 1.0M Ultra context (1M+) | $0.10 Budget | vs → | |
| 13 | Google: Gemini 2.5 Flash Lite Preview 09-2025 | shares reasoning, tool-use, structured-output, vision · similar context window | 1.0M Ultra context (1M+) | $0.10 Budget | vs → | |
| 14 | Google: Gemini 2.5 Pro | shares reasoning, tool-use, structured-output, vision · similar context window | 1.0M Ultra context (1M+) | $1.25 Standard | vs → | |
| 15 | Google: Gemini 2.5 Pro Preview 05-06 | shares reasoning, tool-use, structured-output, vision · similar context window | 1.0M Ultra context (1M+) | $1.25 Standard | vs → |