GLM-5.3 wins on price ($1.4 vs $3/1M input). Claude Sonnet 5 wins on coding (98 vs 91) and writing quality. For most workflows, Claude Sonnet 5 is the stronger default — best value claude — agentic sonnet speed with near-opus capability.
The shortest way to see the safest default, the lower-cost option, and the specialist pick before you read deeper.
Claude Sonnet 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.
GLM-5.3 is the better pick when response speed matters more than maximum reasoning depth.
Claude Sonnet 5 leads on coding with a score of 98 vs 91 for GLM-5.3.
GLM-5.3 is cheaper at $1.4/1M input tokens vs $3/1M for Claude Sonnet 5.
Claude Sonnet 5 is the stronger default for coding tasks.
Claude Sonnet 5 is the safer default: it is built for high-volume agentic workloads and production apps at mid-tier pricing, which covers most of what people bring to this comparison.
GLM-5.3 earns its place when your work is mostly agentic engineering and security work on open weights, even though it loses the overall count here.
GLM-5.3 is the more cost-efficient option at $1.4/1M input — Claude Sonnet 5 costs 2x more per input token, so the gap is worth taking seriously wherever token volume rather than peak quality drives the bill.
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 value Claude — agentic Sonnet speed with near-Opus capability.
Ranks models by the broadest mix of coding, writing, research, and long-context usefulness.
You need the absolute top coding ceiling — Opus 5 leads SWE-bench Verified by over 20 points.
The fastest way to see where the recommendation shifts when your priority changes.
Same price as GLM-5.2, far stronger on agents and security.
Best value Claude — agentic Sonnet speed with near-Opus capability.
Every figure below is the provider's list price or a published capability score — the same numbers the recommendation on this page is built from.
| Model | Input | Output | Est. month | Context | Speed | Coding | Writing | Research |
|---|---|---|---|---|---|---|---|---|
| Claude Sonnet 5Anthropic | $3.00/1M | $15.00/1M | $60 | 1M tokens | Fast | 98 | 98 | 95 |
| GLM-5.3Z.ai | $1.40/1M | $4.40/1M | $23 | 1M tokens | Balanced | 91 | 79 | 82 |
Capability scores are out of 100 and reflect our own weighting of published benchmarks and production signals — see how we evaluate models. “Est. month” assumes 10M input and 2M output tokens at list price, with no batch or caching discounts applied, so treat it as a ceiling.
What each one is genuinely good at, where it falls down, and the situations we would steer you away from it — not just the headline score.
Anthropic's most agentic Sonnet yet — a fast 1M-context workhorse that narrows the gap to Opus-class quality at $3/$15, and the new default model on claude.ai.
You need the absolute top coding ceiling — Opus 5 leads SWE-bench Verified by over 20 points.
The best price-to-capability pick in the Claude lineup. Sonnet 5 replaces Sonnet 4.6 as the production default: markedly better agentic coding and computer use at the same standard price, with a $2/$10 promo through August 2026.
Released June 30, 2026. Default model for Free and Pro claude.ai plans. Promo pricing $2/$10 per 1M through Aug 31, 2026, then $3/$15. 128K max output, Jan 2026 knowledge cutoff.
Z.ai's newest flagship, aimed squarely at software engineering, autonomous agents and cybersecurity — and the first open-weights model to beat Claude Mythos 5 on a security benchmark.
Your procurement process requires a SWE-bench Verified figure, or you need the closed-frontier reasoning ceiling.
The clear upgrade over GLM-5.2 at the same price — take it unless you specifically need a published SWE-bench Verified number to sign off on. The security benchmark lead over Mythos 5 is the genuinely new thing here.
Released August 14, 2026. Z.ai list pricing is $1.40/$4.40, the same rate as GLM-5.2; resellers discount from that list. Also available through the GLM Coding Plan from $18/mo. Reported GPQA Diamond 91.7% and Artificial Analysis Intelligence Index 59.5.
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Claude Sonnet 5 wins on more of the categories we score — coding, writing, research — so it is the better default of the two. GLM-5.3 is the better pick when your work is mostly agentic engineering and security work on open weights. Neither is universally "better": Claude Sonnet 5 is aimed at high-volume agentic workloads and production apps at mid-tier pricing, GLM-5.3 at agentic engineering and security work on open weights.
GLM-5.3 is cheaper at $1.4/1M input and $4.4/1M output. Claude Sonnet 5 costs $3/1M input and $15/1M output.
Both GLM-5.3 and Claude Sonnet 5 have the same 1M context window.
Claude Sonnet 5 is better for coding with a score of 98 vs GLM-5.3's 91 (out of 100). Claude Fable 5 is the overall coding leader in this directory at 100/100.
Claude Sonnet 5 is faster with a fast speed rating (score: 4) vs GLM-5.3's balanced rating (score: 3). Speed matters most for interactive and high-throughput work; for batch jobs the GLM-5.3 latency penalty is usually invisible.
Clearly behind Opus 5 and Fable 5 on the hardest reasoning and long-horizon agent tasks. Updated tokenizer produces ~1.0–1.35x more tokens for the same text, so effective cost runs above sticker price. Avoid it if you need the absolute top coding ceiling — Opus 5 leads SWE-bench Verified by over 20 points. That is the main case for looking at GLM-5.3 instead.
No published SWE-bench Verified score, so it is absent from the benchmark most buyers compare on. Priced identically to GLM-5.2 at $1.40/$4.40 — the upgrade is capability, not value. Avoid it if your procurement process requires a SWE-bench Verified figure, or you need the closed-frontier reasoning ceiling. Against Claude Sonnet 5 specifically, the gap shows up most on coding (98 vs 91).
Take a moderate workload of 10M input and 2M output tokens a month. GLM-5.3 runs $22.80 (at $1.4/1M in and $4.4/1M out); Claude Sonnet 5 runs $60.00 (at $3/1M in and $15/1M out). That is a $37.20/month difference — GLM-5.3 is the cheaper of the two at this volume, and the gap scales linearly as you send more. Output tokens dominate the bill on both, so prompt length matters far less than response length.
Yes, and for most teams that beats picking one. A common split is Claude Sonnet 5 for high-volume agentic workloads and production apps at mid-tier pricing, with GLM-5.3 handling agentic engineering and security work on open weights. Routing high-volume, low-stakes calls to GLM-5.3 at $1.4/1M and reserving Claude Sonnet 5 for the hard cases is usually the cheapest arrangement that does not cost you quality.