Grok 4.5 wins on price ($2 vs $5/1M input). Claude Opus 5 wins on coding (100 vs 94) and writing quality and context window (1M vs 500K). For most workflows, Claude Opus 5 is the stronger default — best premium model for agentic coding — near-fable 5 quality at half the price.
The shortest way to see the safest default, the lower-cost option, and the specialist pick before you read deeper.
Claude Opus 5 is the safest overall answer here when you want the strongest default instead of the lowest list price.
Mistral: Mistral Nemo is the lower-cost option to start with when you still need useful output at scale.
Grok 4.5 is the better pick when response speed matters more than maximum reasoning depth.
Claude Opus 5 leads on coding with a score of 100 vs 94 for Grok 4.5.
Claude Opus 5 has the larger context window: 1M vs 500K for Grok 4.5.
Grok 4.5 is cheaper at $2/1M input tokens vs $5/1M for Claude Opus 5.
Choose Claude Opus 5 for coding and research — complex agentic coding and enterprise agent workflows.
Choose Grok 4.5 when fast.
Grok 4.5 is the more cost-efficient option at $2/1M — worth considering if token volume is a concern.
Switch the scoring lens to see whether the top answer changes when you care more about cost, speed, or long-document work.
Anthropic / Premium / Aug 6, 2026
Best premium model for agentic coding — near-Fable 5 quality at half the price.
Ranks models by the broadest mix of coding, writing, research, and long-context usefulness.
You need fast interactive latency (Sonnet 5 is quicker and one-fifth the price) or absolute frontier ceiling (Fable 5).
The fastest way to see where the recommendation shifts when your priority changes.
Best cost-per-solved-task coding agent — efficiency over ceiling.
Best premium model for agentic coding — near-Fable 5 quality at half the price.
Leads SWE-bench Verified at ~96% — the top public coding score as of August 2026
89.1% on Terminal-Bench 2.1 and state-of-the-art on Frontier-Bench v0.1, more than doubling Opus 4.8's result
Within 0.5% of Claude Fable 5 on CursorBench 3.2 at half the cost per task
Still short of Claude Fable 5's absolute frontier ceiling on the hardest long-running agent tasks
Fast mode (research preview) doubles pricing to $10/$50, erasing the cost advantage over Fable 5
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Claude Opus 5 wins on more categories — coding, research, reasoning. Grok 4.5 is the better pick when fast. The right choice depends on your specific use case.
Grok 4.5 is cheaper at $2/1M input and $6/1M output. Claude Opus 5 costs $5/1M input and $25/1M output.
Claude Opus 5 has the larger context window at 1M tokens vs Grok 4.5's 500K. For large document analysis, Claude Opus 5 is the stronger pick.
Claude Opus 5 is better for coding with a score of 100 vs Grok 4.5's 94 (out of 100). Claude Fable 5 is the overall coding leader in this directory at 100/100.
Grok 4.5 is faster with a fast speed rating (score: 4) vs Claude Opus 5's deliberate rating (score: 2).