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© 2026 CompareLLM. Public benchmark data aggregated from Arena Elo, LiveBench, SWE-bench & OpenRouter.

Every score has a dated snapshot.

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  3. Claude Sonnet 4.5 vs Writer: Palmyra X5

Pairwise benchmark snapshot · Aug 17, 2026noindex (thin pair)

Claude Sonnet 4.5 vs Writer: Palmyra X5 benchmark

In this head-to-head showdown, Writer: Palmyra X5 is more budget-friendly at $6/1M per 1M output tokens. Review the complete breakdown below to determine which model best fits your performance and budget requirements.

Executive Comparison Verdict

Bottom Line: Choose Claude Sonnet 4.5 if your priority is peak reasoning, complex code generation, and top preference Elo. Choose Writer: Palmyra X5 if you are optimizing for low latency, high throughput, and cost-efficient API deployment.
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Executive Verdict Summary

Writer: Palmyra X5 holds empirical advantage (3 of 3 metrics)

Coding / SWESWE-bench
Claude Sonnet 4.5Top code solve rate
ReasoningGPQA / Live
Claude Sonnet 4.5Top logical accuracy
Best Value$/1M Tok
Writer: Palmyra X5Lowest API billing cost
Speed / TokTok/Sec
Claude Sonnet 4.5Fastest stream rate

Verified Advantage Breakdown

3 benchmarks evaluated across capability, speed, and cost

Claude Sonnet 4.5 (0)Writer: Palmyra X5 (3)
Claude Sonnet 4.5
0 of 3 Wins
Competitive baseline across remaining benchmarks
Writer: Palmyra X5
3 of 3 Wins
✓Input price✓Output price✓Context window
Anthropic
Claude Sonnet 4.5

Workhorse Anthropic model: most of Opus coding quality at a mid-tier price.

Sonnet 4.5Elo 1,524In: $3 · Out: $15/1M
writer
Leads 3 of 3
Writer: Palmyra X5

Auto-discovered from OpenRouter (writer/palmyra-x5). Preview until a second source matches.

In: $0.6 · Out: $6/1M

Claude 4 Series Lineage & Sibling Variants

5 models

Currently comparing Claude Sonnet 4.5 vs Writer: Palmyra X5. Alternative family tiers available.

Active: Claude Sonnet 4.5
Claude Opus 4.5$25Claude Opus 4.6$25Claude Opus 4.8$25Claude Haiku 4.5$5
Top Rival Showdowns for Claude Sonnet 4.5
All Matchups
Compare vs:vs GPT-5vs Gemini 3 Provs Grok 4.6vs DeepSeek V4 Provs Qwen 3 Max
Preference Leader

No shared data

Single model data

Throughput Leader

No shared data

No latency data

Value per Dollar LeaderWriter: Palmyra X5 Wins

Writer: Palmyra X5

$6 / 1M output

Capability Percentiles

Relative percentile scores computed across all active models in the benchmark catalog.

Multi-Dimensional Capability Radar

Leaders Matchup Capability Radar

Comparing top standard models across 6 key capability dimensions. Tap any spoke or dot to inspect.

Tap any node to inspect
0–100 %ile

Overall Matchup Breakdown

Category wins across reasoning intelligence, generation speed, and token cost.

Claude Sonnet 4.5 (7)vsWriter: Palmyra X5 (3)
Claude Sonnet 4.5: 7W (70%)Overall: Claude Sonnet 4.5Writer: Palmyra X5: 3W (30%)
← Claude Sonnet 4.5Writer: Palmyra X5 →
🏆Claude Sonnet 4.5 Leads(5/5)

Intelligence & Reasoning

Preference Elo, Coding proficiency, SWE-bench & LiveBench accuracy

Benchmark
Claude Sonnet 4.5vsWriter: Palmyra X5
Preference Elo
1,524vs—
Coding Elo
1,531vs—
SWE-bench
70.1%vs—
LiveBench
67.4%vs—
GPQA Diamond
80.2%vs—
Claude Sonnet 4.5: 5WWriter: Palmyra X5: 0W
🏆Claude Sonnet 4.5 Leads(2/2)

Speed & Latency

Generation throughput and time to first token responsiveness

Benchmark
Claude Sonnet 4.5vsWriter: Palmyra X5
Output speed
88 tok/svs—
Time to first token
240 msvs—
Claude Sonnet 4.5: 2WWriter: Palmyra X5: 0W
🏆Writer: Palmyra X5 Leads(3/3)

Pricing & Capacity

Cost per million tokens and max context window length

Benchmark
Claude Sonnet 4.5vsWriter: Palmyra X5
Output price
$15/1Mvs$6/1M+$9/1M
Input price
$3/1Mvs$0.6/1M+$2.4/1M
Context window
1Mvs1M+40k
Claude Sonnet 4.5: 0WWriter: Palmyra X5: 3W

Side-by-Side Benchmark Matrix

Claude Sonnet 4.5Writer: Palmyra X5
Preference Elo
Claude Sonnet 4.51,524
Writer: Palmyra X5—
Coding Elo
Claude Sonnet 4.51,531
Writer: Palmyra X5—
LiveBench
Claude Sonnet 4.567.4%
Writer: Palmyra X5—
SWE-bench
Claude Sonnet 4.570.1%
Writer: Palmyra X5—
GPQA Diamond
Claude Sonnet 4.580.2%
Writer: Palmyra X5—
Time to first token
Claude Sonnet 4.5240 ms
Writer: Palmyra X5—
Output speed
Claude Sonnet 4.588 tok/s
Writer: Palmyra X5—
Input priceWriter: Palmyra X5 +$2.4/1M
Claude Sonnet 4.5$3/1M
Writer: Palmyra X5$0.6/1M
Output priceWriter: Palmyra X5 +$9/1M
Claude Sonnet 4.5$15/1M
Writer: Palmyra X5$6/1M
Context windowWriter: Palmyra X5 +40k
Claude Sonnet 4.51M
Writer: Palmyra X51M
BenchmarkClaude Sonnet 4.5Writer: Palmyra X5Advantage Delta
Preference Elo
1,524
lmarena · Aug 17, 2026
——
Coding Elo
1,531
lmarena · Aug 17, 2026
——
LiveBench
67.4%
livebench · Aug 17, 2026
——
SWE-bench
70.1%
swebench · Aug 17, 2026
——
GPQA Diamond
80.2%
seed-bootstrap · Aug 1, 2026
——
Time to first token
240 ms
seed-bootstrap · Aug 1, 2026
——
Output speed
88 tok/s
seed-bootstrap · Aug 1, 2026
——
Input price
$3/1M
openrouter · Aug 17, 2026
$0.6/1M
openrouter · Aug 17, 2026
+$2.4/1M
Output price
$15/1M
openrouter · Aug 17, 2026
$6/1M
openrouter · Aug 17, 2026
+$9/1M
Context window
1M
openrouter · Aug 17, 2026
1M
openrouter · Aug 17, 2026
+40k

Workload Cost & Savings Calculator

Simulate monthly production API costs in USD (US Dollar).

Save 66% with Writer: Palmyra X5
Monthly Volume50M tokens/mo
Quick Presets:
Token Ratio (In vs Out)70% In / 30% Out
RAG / Search (10% out)Coding / Chat (50% out)
Claude Sonnet 4.5$330.00 / mo
In: $105Out: $225
Writer: Palmyra X5$111.00 / mo
In: $21Out: $90
Estimated Cost Delta

Writer: Palmyra X5 is estimated to save $219.00/month ($2,628/year).

Based on 50M tokens (30% gen)

Key Selection Recommendations

  • 1
    Writer: Palmyra X5:Pick Writer: Palmyra X5 when you are optimizing output cost.
  • 2
    Writer: Palmyra X5:Pick Writer: Palmyra X5 for million-token RAG or long-document jobs.

Recommended Workload Routing

Repo / coding agentsinsufficient data

Need SWE-bench on both sides.

High-volume chatWriter: Palmyra X5

Lower output list price ($6/1M).

Voice / low-latency UIinsufficient data

Need TTFT on both sides.

Long-document RAGWriter: Palmyra X5

Larger window (1M).

Screenshots / visionClaude Sonnet 4.5

Claude Sonnet 4.5 is the side marked multimodal in the catalog.

Target WorkloadRecommended PickEvaluation Rationale
Repo / coding agentsinsufficient dataNeed SWE-bench on both sides.
High-volume chatWriter: Palmyra X5Lower output list price ($6/1M).
Voice / low-latency UIinsufficient dataNeed TTFT on both sides.
Long-document RAGWriter: Palmyra X5Larger window (1M).
Screenshots / visionClaude Sonnet 4.5Claude Sonnet 4.5 is the side marked multimodal in the catalog.

Related Editorial Dispatches & Benchmark Notes

View all news
launchFeb 18, 2026

Claude Sonnet 4.5 is the previous workhorse — still a valid vs baseline

Most of Opus 4.5 coding at a mid-tier price. Sonnet 5 replaced it as the buy; 4.5 remains a compare baseline.

Cast Your Matchup Vote

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CompareLLM AI Matrix

Verified Head-to-Head Telemetry

LIVE BENCHMARK
VS
Anthropic

Claude Sonnet 4.5

Elo 1,524
SWE-bench70.1%
Speed (tok/s)88 tok/s
Input / 1M Tokens$3/1M
Output / 1M Tokens$15/1M
writer

Writer: Palmyra X5

Elo n/a
SWE-bench—
Speed (tok/s)1M
Input / 1M Tokens$0.6/1M
Output / 1M Tokens$6/1M

Frequently Asked Questions

Which is better overall, Claude Sonnet 4.5 or Writer: Palmyra X5?
We do not have preference Elo for both models, so we do not declare an overall winner. Compare the metrics that exist.
Which is better at coding, Claude Sonnet 4.5 or Writer: Palmyra X5?
SWE-bench is missing for at least one model, so we do not rank coding from a single number.
Which is cheaper to run in production?
Writer: Palmyra X5 output tokens are $6/1M versus $15/1M. Input prices and retry rates still move the real bill.
Which is faster, Claude Sonnet 4.5 or Writer: Palmyra X5?
We do not have TTFT for both models.
Which has the larger context window?
Writer: Palmyra X5 accepts 1M tokens versus 1M.
Can I self-host either model?
Neither model is marked open-weights here. You are comparing hosted APIs.
Are these scores from CompareLLM’s own evals?
No. V1 aggregates public leaderboards (and optional first-party latency pings). Each cell names its source and date. Read /methodology.
What does preference Elo mean on this page?
Preference Elo is a crowd vote from LMArena / Arena. People see two hidden answers and pick the one they like more. The model that wins more often gets a higher Elo. That means people preferred it — not that it passed a school test. It is not SWE-bench, not accuracy, and not a number we invent. Claude Sonnet 4.5 and Writer: Palmyra X5 Elo cells are dated snapshots from the named source — we do not compute Arena ourselves.

Related news

  • launch · Feb 18, 2026

    Claude Sonnet 4.5 is the previous workhorse — still a valid vs baseline

Similar Head-to-Head Comparisons

All Claude Sonnet 4.5 matchups →|All Writer: Palmyra X5 matchups →
Claude Sonnet 4.5 vs Claude Sonnet 4 (previous sonnet)Claude Sonnet 4.5 vs Claude Sonnet 5 (next sonnet)Claude Opus 4.5 vs Claude Sonnet 4.5Claude Opus 4.6 vs Claude Sonnet 4.5Claude Opus 4.8 vs Claude Sonnet 4.5Claude Fable 5 vs Claude Sonnet 4.5